Holtek HT49R30A-1 User manual

HT49R30A-1, HT49R50A-1, HT49R70A-1
LCD Type MCU
Handbook
March 2005
Copyright Ó2005 by HOLTEK SEMICONDUCTOR INC. All rights reserved. Printed in Taiwan. No part of this publication
may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photo-
copying, recording, or otherwise without the prior written permission of HOLTEK SEMICONDUCTOR INC.

Contents
Part I Microcontroller Profile ....................................................................1
Chapter 1 Hardware Structure ..........................................................................................3
Introduction .....................................................................................................................3
Features ..........................................................................................................................4
Technology Features ................................................................................................4
Kernel Features ........................................................................................................4
Peripheral Features ..................................................................................................5
Selection Table ...............................................................................................................5
Block Diagram ................................................................................................................6
Pin Assignment ...............................................................................................................7
Pin Description ................................................................................................................8
Absolute Maximum Ratings ..........................................................................................12
D.C. Characteristics ......................................................................................................13
A.C. Characteristics ......................................................................................................15
System Architecture ......................................................................................................17
Clocking and Pipelining ..........................................................................................17
Program Counter ....................................................................................................18
Stack ......................................................................................................................20
Arithmetic and Logic Unit -ALU ............................................................................21
Program Memory ..........................................................................................................21
Organization ...........................................................................................................21
Special Vectors ......................................................................................................22
Look-up Table .........................................................................................................23
Table Program Example .........................................................................................24
Contents
i

Data Memory ................................................................................................................25
Organization ...........................................................................................................25
General Purpose Data Memory .............................................................................26
Special Purpose Data Memory ..............................................................................27
LCD Memory ..........................................................................................................27
Special Function Registers ...........................................................................................28
Indirect Addressing Registers -IAR0, IAR1 ..........................................................28
Memory Pointers -MP0, MP1 ...............................................................................28
Bank Pointer -BP ..................................................................................................29
Accumulator -ACC ................................................................................................29
Program Counter Low Register -PCL ...................................................................30
Look-up Table Registers -TBLP, TBLH .................................................................30
Real Time Clock Control Register -RTCC ............................................................30
Status Register -STATUS .....................................................................................31
Interrupt Control Registers -INTC0, INTC1 ..........................................................32
Timer/Event Counter Registers ..............................................................................32
Input/Output Port Registers ....................................................................................33
Input/Output Ports .........................................................................................................33
Pull-high Resistors .................................................................................................33
Port A Wake-up ......................................................................................................34
Pin-shared Functions .............................................................................................34
Programming Considerations .................................................................................36
Liquid Crystal Display (LCD) Driver ..............................................................................37
LCD Memory ..........................................................................................................37
LCD Clock ..............................................................................................................38
LCD Driver Output ..................................................................................................39
LCD Voltage Source and Biasing ...........................................................................44
Programming Considerations .................................................................................45
Timer/Event Counters ...................................................................................................46
Configuring the Timer/Event Counter Input Clock Source .....................................47
Timer Registers -TMR, TMR0, TMR1, TMR1L/TMR1H .......................................48
Timer Control Registers -TMRC, TMR0C, TMR1C ..............................................49
Configuring the Timer Mode ...................................................................................51
Configuring the Event Counter Mode .....................................................................51
Configuring the Pulse Width Measurement Mode ..................................................52
Programmable Frequency Divider -PFD ..............................................................53
I/O Interfacing .........................................................................................................53
Programming Considerations .................................................................................54
Interrupts .......................................................................................................................55
Interrupt Registers...................................................................................................55
Interrupt Priority ......................................................................................................58
External Interrupt ....................................................................................................59
Timer/Event Counter Interrupt ................................................................................59
Time Base Interrupt ................................................................................................59
Real Time Clock Interrupt .......................................................................................60
Programming Considerations .................................................................................61
ii
LCD Type MCU

Reset and Initialization ..................................................................................................62
Reset ......................................................................................................................62
Oscillator .......................................................................................................................66
System Clock Configurations .................................................................................66
System Crystal/Ceramic Oscillator .........................................................................66
System RC Oscillator .............................................................................................67
RTC Oscillator ........................................................................................................68
Watchdog Timer Oscillator .....................................................................................69
Internal Clock Source .............................................................................................69
HALT and Wake-up in Power Down Mode ...................................................................70
Low Voltage Detector -LVD .........................................................................................70
Watchdog Timer ............................................................................................................71
Buzzer ...........................................................................................................................73
Configuration Options ...................................................................................................74
Application Circuits .......................................................................................................76
Part II Programming Language ..............................................................81
Chapter 2 Instruction Set Introduction ..........................................................................83
Instruction Set ...............................................................................................................83
Instruction Timing ...................................................................................................83
Moving and Transferring Data ................................................................................83
Arithmetic Operations .............................................................................................84
Logical and Rotate Operations ...............................................................................84
Branches and Control Transfer ..............................................................................84
Bit Operations ........................................................................................................84
Table Read Operations ..........................................................................................85
Other Operations ....................................................................................................85
Instruction Set Summary ..............................................................................................85
Convention .............................................................................................................85
Chapter 3 Instruction Definition .....................................................................................89
Chapter 4 Assembly Language and Cross Assembler ...............................................101
Notational Conventions ...............................................................................................101
Statement Syntax .......................................................................................................102
Name ....................................................................................................................102
Operation .............................................................................................................102
Operand ...............................................................................................................102
Comment ..............................................................................................................103
Assembly Directives ...................................................................................................103
Conditional Assembly Directives ..........................................................................103
File Control Directives ..........................................................................................104
Program Directives ...............................................................................................105
Contents
iii

Data Definition Directives .....................................................................................108
Macro Directives ...................................................................................................110
Assembly Instructions .................................................................................................112
Name ....................................................................................................................112
Mnemonic .............................................................................................................112
Operand, Operator and Expression ......................................................................112
Miscellaneous .............................................................................................................114
Forward References .............................................................................................114
Local Labels .........................................................................................................114
Reserved Assembly Language Words .................................................................115
Cross Assembler Options ...........................................................................................116
Assembly Listing File Format ......................................................................................116
Source Program Listing ........................................................................................116
Summary of Assembly ..........................................................................................117
Miscellaneous .......................................................................................................117
Part III Development Tools ....................................................................119
Chapter 5 MCU Programming Tools .............................................................................121
HT-IDE Development Environment .............................................................................121
Holtek In-Circuit Emulator -HT-ICE ...........................................................................122
HT-ICE Interface Card ..........................................................................................122
OTP Programmer .................................................................................................123
OTP Adapter Card ...............................................................................................123
System Configuration .................................................................................................123
HT-ICE Interface Card Settings ............................................................................124
Installation ...................................................................................................................124
System Requirement ............................................................................................124
Hardware Installation ...........................................................................................125
Software Installation .............................................................................................125
Chapter 6 Quick Start ....................................................................................................131
Step 1 -Create a New Project .............................................................................131
Step 2 -Add Source Program Files to the Project ..............................................131
Step 3 -Build the Project .....................................................................................131
Step 4 -Programming the OTP Device ...............................................................131
Step 5 -Transmit Code to Holtek ........................................................................133
iv
LCD Type MCU

Chapter 7 LCD Simulator ...............................................................................................133
Introduction .................................................................................................................133
LCD Panel Configuration File .....................................................................................133
Relationship Between the Panel File and the Current Project .............................134
Selecting the HT-LCDS ........................................................................................134
LCD Panel Picture File ...............................................................................................135
Setup the LCD Panel Configuration File .....................................................................135
Setup the Panel Configurations ...........................................................................135
Select the Patterns and their Positions ................................................................136
Add a New Pattern ...............................................................................................136
Delete a Pattern ...................................................................................................137
Change the Pattern ..............................................................................................137
Change the Pattern Position ................................................................................137
How to Add a User-defined Matrix .......................................................................138
Define the Pattern Using the Panel Editor ...........................................................138
Add New Pattern Items Using a Batch File ..........................................................139
Selecting Color for an LCD Panel ........................................................................139
Simulating the LCD .....................................................................................................140
Stop the Simulation ..............................................................................................140
Appendix ..................................................................................................141
Appendix A Device Characteristic Graphics ...............................................................143
Appendix B Package Information .................................................................................151
Contents
v

vi
LCD Type MCU

Preface
Since the founding of the company, Holtek Semiconductor Inc. has concentrated much of its de-
sign efforts in the area of microcontroller development. Although supplying a wide range of semi-
conductor devices, the microcontroller category has always been a key product category within
the Holtek range, and one which will continue to expand as their devices increase in functionality
and maturity. By capitalizing on the substantial accumulated skills within its dedicated
microcontroller development department, Holtek has been able to release a comprehensive
range of high quality low-cost microcontroller devices for a wide range of application areas.
Holtek's high quality embedded LCD microcontroller solutions provide a means for customers to
greatly enhance the functional contents of their LCD-based products, which when combined with
Holtek¢s comprehensive range of development tools provide designers with the means to reduce
their design to market times and greatly increasing their added value.
This handbook is divided into three parts for user convenience. Most details regarding general
datasheet information and device specification is located within Part I. Information related to
microcontroller programming such as device instruction set, instruction definition, and assembly
language directives is found within Part II. Part III relates to the Holtek range of Development Tools
where information can be found on their installation and use.
By compiling all relevant data together in one handbook we hope users of the Holtek range of LCD
Type microcontroller devices will have at their fingertips a useful, complete and simple means to ef-
ficiently implement their microcontroller applications. Holtek¢s efforts to combine information on de-
vice specifications, programming and development tools into one publication have produced a
handbook which with careful use by the user should result in trouble free designs and the maxi-
mum benefit being gained from the many features of Holtek microcontroller devices. We welcome
feedback and comments from our customers regarding further improvements.
Preface
vii

viii
LCD Type MCU

Part I
Microcontroller Profile
Part I Microcontroller Profile
1

2
LCD Type MCU

Chapter 1
Hardware Structure
This section is the main datasheet section of the LCD Type microcontroller handbook and con-
tains all the parameters and information related to the hardware. The information contained pro-
vides designers with details on all the main hardware features of the LCD Type microcontroller
range which together with the programming section contains the information to enable swift and
successful implementation of user microcontroller applications. By proper consultation of the rele-
vant parts of this section, users can ensure that they make the most efficient use of the flexible and
multi-function features within the LCD Type microcontroller series.
Introduction
The HT49R30A-1/HT49C30-1/HT49C30L, HT49R50A-1/HT49C50-1/HT49C50L and
HT49R70A-1/HT49C70-1/HT49C70L are 8-bit high performance, RISC architecture
microcontroller devices specifically designed for a wide range of LCD control product applications.
Device flexibility is enhanced with their internal special features such as HALT and wake-up func-
tions, oscillator options, buzzer driver, etc. These features combine to ensure applications require
a minimum of external components and therefore reduce overall product costs. Having the advan-
tages of low power consumption, high performance, I/O flexibility as well as low cost, these de-
vices have the versatility to suit a wide range of LCD-based application possibilities such as
scales, electronic multimeters, gas meters, timers, calculators, remote controllers as well as many
other LCD-based industrial and home appliance applications. Many features are common to all de-
vices, however, they differ in areas such as LCD segment count, I/O pin count, RAM and ROM ca-
pacity, timer number and package types, etc.
The HT49R30A-1, HT49R50A-1 and HT49R70A-1 are OTP devices offering the advantages of
easy and effective program updates, using the Holtek range of development and programming
tools. These devices provide the designer with the means for fast and low cost product develop-
ment cycles. However, for applications that are at a mature state in their design process, the
HT49C30-1, HT49C50-1, HT49C70-1, HT49C30L, HT49C50L and HT49C70L mask version de-
vices offer a complementary device for products with high volume and low cost demands. Fully pin
and functionally compatible with their OTP sister devices, such mask version devices provide the
ideal substitute for products which have gone beyond their development cycle and are facing cost
down demands.
Chapter 1 Hardware Structure
3
1

The HT49C30L, HT49C50L and HT49C70L are all low voltage versions of the LCD Type MCU se-
ries. With the ability to operate at a minimum low voltage power supply of only 1.2V these devices
are extremely suitable for single cell battery applications. Although they are only available as
mask versions, their sister OTP devices, the HT49R30A-1, HT49R50A-1 and the HT49R70A-1
are fully compatible and available for use during product development.
Features
Technology Features
·High-performance RISC Architecture
·Low-power Fully Static CMOS Design
·Operating Voltage:
For HT49R30A-1/HT49C30-1, HT49R50A-1/HT49C50-1, HT49R70A-1/HT49C70-1
fSYS=4MHz: 2.2V~5.5V
fSYS=8MHz: 3.3V~5.5V
For HT49C30L, HT49C50L, HT49C70L
fSYS=500kHz: 1.2V~2.2V
·Power Consumption: 3mA Typical at 5V 8MHz
·Temperature Range:
Operating Temperature -40°Cto85°C (Industrial Grade)
Storage Temperature -50°Cto125°C
Kernel Features
·Program Memory:
2K´14 OTP/Mask ROM (HT49R30A-1/HT49C30-1/HT49C30L)
4K´15 OTP/Mask ROM (HT49R50A-1/HT49C50-1/HT49C50L)
8K´16 OTP/Mask ROM (HT49R70A-1/HT49C70-1/HT49C70L)
·Data Memory:
96´8 RAM (HT49R30A-1/HT49C30-1/HT49C30L)
160´8 RAM (HT49R50A-1/HT49C50-1/HT49C50L)
224´8 RAM (HT49R70A-1/HT49C70-1/HT49C70L)
·LCD Driver:
18´4, 19´3or19´2 (HT49R30A-1/HT49C30-1/HT49C30L)
32´4, 33´3or33´2 (HT49R50A-1/HT49C50-1/HT49C50L)
40´4, 41´3or41´2 (HT49R70A-1/HT49C70-1/HT49C70L)
·Table Read Function
·Multi-level Hardware Stack:
4-level (HT49R30A-1/HT49C30-1/HT49C30L)
6-level (HT49R50A-1/HT49C50-1/HT49C50L)
16-level (HT49R70A-1/HT49C70-1/HT49C70L)
·Bit Manipulation Instructions
·63 Powerful Instructions
·Most Instructions Implemented in 1 Machine Cycle
4
LCD Type MCU

Peripheral Features
·From 6 to 8 Input Pins with Pull-high Resistors
·From 8 to 16 Bidirectional I/O with Pull-high Options
·Internal LCD Driver
·Internal Dedicated LCD Memory
·Port A Wake-up Options
·One or Two Event Counter Inputs with Internal Interrupt
·Two External Interrupt Inputs
·Full Timer Functions with Internal Interrupt
·Watchdog Timer (WDT)
·HALT and Wake-up Feature for Power Saving Operation
·PFD Output
·Buzzer Driver Outputs
·On-chip Crystal and RC Oscillator
·32768Hz Real Time Clock (RTC) Function
·Low Voltage Reset/Detector (LVR/LVD) Feature for Brown-out Protection
·Mask Version Devices Available for High Volume Production
·Programming Interface with Code Protection
·Low Voltage Devices Available for Single Cell Battery Operation
·Full Suite of Supported Hardware and Software Tools Available
Selection Table
The series of LCD Type microcontrollers include a comprehensive range of features, some of
which are standard and some of which are device dependent. Most features are common to all de-
vices, the main features distinguishing them are Program Memory, Data Memory capacity, LCD
segment count and timer functions, etc. To assist users in their selection of the most appropriate
device for their application, the following table, which summarizes the main features of each de-
vice, is provided.
Part No. VDD Program
Memory
Data
Memory I/O LCD Timer Interrupt Stack Package
Types
HT49R30A-1
HT49C30-1 2.2V~5.5V 2K´14 96´88 I/O +
6 I/P
18´4
or
19´3
8-bit´15 4 48SSOP
HT49C30L 1.2V~2.2V
HT49R50A-1
HT49C50-1 2.2V~5.5V 4K´15 160´812 I/O +
8 I/P
32´4
or
33´3
8-bit´266
48SSOP,
100QFP
HT49C50L 1.2V~2.2V
HT49R70A-1
HT49C70-1 2.2V~5.5V 8K´16 224´816 I/O +
8 I/P
40´4
or
41´3
8-bit´1
16-bit´16 16 100QFP
HT49C70L 1.2V~2.2V
Note 1. Part numbers including ²C²are mask version devices, ²R²are OTP devices.
2. Part numbers including ²L²are low voltage mask version devices.
3. For the HT49R50A-1/HT49C50-1/HT49C50L devices, the above table shows the values for the
100-pin QFP package. For the 48-pin SSOP package, there are 8 I/O and 6 Input pins, 19´3
LCD or 18´4 LCD driver pins.
Chapter 1 Hardware Structure
5

Block Diagram
The following block diagram illustrates the main functional blocks of the LCD Type microcontroller
series of devices.
Note This block diagram represents the OTP devices, for the mask device there is no Device
Programming Circuitry.
6
LCD Type MCU
T i m i n g
G e n e r a t o r
S y s t e m R C /
X ' t a l O s c i l l a t o r I n s t r u c t i o n
D ecoder
I n s t r u c t i o n
R e g i s t e r
W D T
O s c i l l a t o r L C D
M e m o r y
A d d r e s s D e c o d e r
M e m o r y
o i n t e r
M U X A C C
Look-up
T a b l e
R e g i s t e r
C o n f i g .
R e g i s t e r
W a t c h d o g
T i m e r
R e s e t &
L V R / L V D
C o n f i g .
R e g i s t e r
T i m e r ( s ) /
C ounter
B u z z e r
D r i v e r
C o n f i g .
R e g i s t e r
I n t e r r u p t
C i r c u i t
C o n f i g .
R e g i s t e r
I/O
o r t s
D e v i c e
r o g r a m m i n g
C i r c u i t r y
C o n f i g u r a t i o n
O p t i o n
r o g r a m
M e m o r y
A d d r e s s D e c o d e r
S t a c k
S t a c k o i n t e r
r o g r a m
C o u n t e r
Look-up
T a b l e
o i n t e r
T o r o g r a m
M e m o r y
A L U
S h i f t e r
MUX
R T C
O S C
L C D D r i v e r s
C O M S E G
D a t a
M e m o r y B a n k
o i n t e r
F D

Pin Assignment
Note The pin compatibility features of the microcontroller packages allow for straightforward upgrading
to devices of higher functionality with minimal changes to application hardware.
Chapter 1 Hardware Structure
7
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
A 0 / B Z
A 1 / B Z
A 2
A 3 / F D
A 4
A 5
A 6
A 7
B 0 / I N T 0
B 1 / I N T 1
B 2 / T M R 0
B 3 / T M R 1
B 4
B 5
V S S
V L C D
V 1
V 2
C 1
C 2
C O M 0
C O M 1
C O M 2
C O M 3 / S E G 3 2
R E S
O S C 1
O S C 2
V D D
O S C 3
O S C 4
S E G 1 0
S E G 1 1
S E G 1 2
S E G 1 3
S E G 1 4
S E G 1 5
S E G 1 6
S E G 1 7
S E G 1 8
S E G 1 9
S E G 2 0
S E G 2 1
S E G 2 2
S E G 2 3
S E G 2 4
S E G 2 5
S E G 2 6
S E G 2 7
H T 4 9 R 5 0 A - 1 / H T 4 9 C 5 0 - 1 / H T 4 9 C 5 0 L
4 8 S S O P - A
H T 4 9 R 5 0 A - 1 / H T 4 9 C 5 0 - 1 / H T 4 9 C 5 0 L
1 0 0 Q F P - A
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
3 0
3 1
3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0
81828384858687888990919293949596979899100 8 0
7 9
7 8
7 7
7 6
7 5
7 4
7 3
7 2
7 1
7 0
6 9
6 8
6 7
6 6
6 5
6 4
6 3
6 2
6 1
6 0
5 9
5 8
5 7
5 6
5 5
5 4
5 3
5 2
5 1
A 5
N C
N C
N C
N C
N C
A 6
A 7
B 0 / I N T 0
B 1 / I N T 1
B 2 / T M R 0
B 3 / T M R 1
B 4
B 5
B 6
B 7
C 0
C 1
C 2
C 3
N C
N C
N C
N C
N C
N C
N C
N C
N C
VSS
N C S E G 2 2
S E G 2 3
S E G 2 4
S E G 2 5
S E G 2 6
S E G 2 7
S E G 2 8
S E G 2 9
S E G 3 0
S E G 3 1
C O M 3 / S E G 3 2
C O M 2 C O M 1 C O M 0 C 2 C 1 V 2 V 1 V L C D
S E G 1
S E G 2
S E G 3
N C
N C
N C
S E G 4
S E G 5
S E G 6
S E G 7
S E G 8
S E G 9
S E G 1 0
S E G 1 1
S E G 1 2
S E G 1 3
S E G 1 4
S E G 1 5
S E G 1 6
S E G 1 7
S E G 1 8
S E G 1 9
S E G 2 0
S E G 2 1
N C
N C
N C
N C
N C
N C
S E G 0
N C N C N C N C N C N C N C N C
O S C 4 O S C 3
V D D
O S C 2 O S C 1
R E S
A 0 / B Z A 1 / B Z
A 2
A 3 / F D
A 4
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7
3 6
3 5
3 4
3 3
3 2
3 1
3 0
2 9
2 8
2 7
2 6
2 5
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
A 0 / B Z
A 1 / B Z
A 2
A 3 / F D
A 4
A 5
A 6
A 7
B 0 / I N T 0
B 1 / I N T 1
B 2 / T M R
B 3
B 4
B 5
V S S
V L C D
V 1
V 2
C 1
C 2
C O M 0
C O M 1
C O M 2
C O M 3 / S E G 1 8
R E S
O S C 1
O S C 2
V D D
O S C 3
O S C 4
S E G 0
S E G 1
S E G 2
S E G 3
S E G 4
S E G 5
S E G 6
S E G 7
S E G 8
S E G 9
S E G 1 0
S E G 1 1
S E G 1 2
S E G 1 3
S E G 1 4
S E G 1 5
S E G 1 6
S E G 1 7
H T 4 9 R 3 0 A - 1 / H T 4 9 C 3 0 - 1 / H T 4 9 C 3 0 L
4 8 S S O P - A
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
3 0
3 1
3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 4 0 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 5 0
81828384858687888990919293949596979899100
8 0
7 9
7 8
7 7
7 6
7 5
7 4
7 3
7 2
7 1
7 0
6 9
6 8
6 7
6 6
6 5
6 4
6 3
6 2
6 1
6 0
5 9
5 8
5 7
5 6
5 5
5 4
5 3
5 2
5 1
A 5
N C
N C
N C
N C
N C
A 6
A 7
B 0 / I N T 0
B 1 / I N T 1
B 2 / T M R 0
B 3 / T M R 1
B 4
B 5
B 6
B 7
C 0
C 1
C 2
C 3
C 4
C 5
C 6
C 7
N C
N C
N C
N C
N C
VSS
N C S E G 3 0
S E G 3 1
S E G 3 2
S E G 3 3
S E G 3 4
S E G 3 5
S E G 3 6
S E G 3 7
S E G 3 8
S E G 3 9
C O M 3 / S E G 4 0
C O M 2 C O M 1 C O M 0 C 2 C 1 V 2 V 1 V L C D
S E G 9
S E G 1 0
S E G 1 1
N C
N C
N C
S E G 1 2
S E G 1 3
S E G 1 4
S E G 1 5
S E G 1 6
S E G 1 7
S E G 1 8
S E G 1 9
S E G 2 0
S E G 2 1
S E G 2 2
S E G 2 3
S E G 2 4
S E G 2 5
S E G 2 6
S E G 2 7
S E G 2 8
S E G 2 9
N C
N C
N C
N C
N C
N C
S E G 8
S E G 7
S E G 6
S E G 5
S E G 4
S E G 3
S E G 2
S E G 1
S E G 0
O S C 4 O S C 3
V D D
O S C 2 O S C 1
R E S
A 0 / B Z A 1 / B Z
A 2
A 3 / F D
A 4
H T 4 9 R 7 0 A - 1 / H T 4 9 C 7 0 - 1 / H T 4 9 C 7 0 L
1 0 0 Q F P - A

Pin Description
HT49R30A-1/HT49C30-1/HT49C30L
Pad Name I/O Options Description
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
I/O
Wake-up
CMOS or NMOS
Pull-high
PA0/PA1 or BZ/BZ
PA3 or PFD
Bidirectional 8-bit input/output port. Each pin on this
port can be configured as a wake-up input by a con-
figuration option. Configuration options determine
whether pins PA0~PA3 are configured as CMOS out-
puts or NMOS input/output pins. If PA0~PA3 are con-
figured as NMOS input/output pins, then pull high
options are available but apply to all 4 pins, not indi-
vidual pins. Pins PA4~PA7 are always configured as
NMOS input/output pins with pull-high resistors con-
nected. Pins PA0, PA1 and PA3 are pin-shared with
BZ, BZ and PFD respectively, the function of which is
chosen via configuration options.
PB0/INT0
PB1/INT1
PB2/TMR
PB3~PB5
I¾
6-bit Schmitt Trigger input port. Each input pin is con-
nected to an internal pull-high resistor. PB0, PB1 and
PB2 are pin-shared with INT0, INT1 and TMR re-
spectively.
VLCD I ¾LCD power supply for HT49R30A-1/HT49C30-1.
LCD voltage pump for HT49C30L.
V2 I ¾LCD voltage pump for HT49R30A-1/HT49C30-1.
LCD power supply for HT49C30L.
V1, C1, C2 I ¾LCD voltage pump
COM0~COM2
COM3/SEG18 O1/2, 1/3 or 1/4 Duty
The 1/4 LCD duty cycle configuration option will de-
termine whether pin COM3/SEG18 is configured as a
SEG18 segment driver or as a common COM3 output
driver for the LCD panel. COM0~COM2 are the LCD
common outputs.
SEG0~SEG17 O ¾LCD driver outputs for LCD panel segments
OSC1
OSC2
I
OCrystal or RC
OSC1 and OSC2 are connected to an external RC
network or external crystal (determined by configura-
tion option) for the internal system clock. For external
RC system clock operation, OSC2 is an output pin for
1/4 system clock. If an RTC oscillator on pins OSC3
and OSC4 is used as a system clock, then the OSC1
and OSC2 pins should be left floating.
OSC3
OSC4
I
O
RTC or
System Clock
OSC3 and OSC4 are connected to a 32768Hz crystal
to form a real time clock for timing purposes or to form
a system clock.
8
LCD Type MCU

Pad Name I/O Options Description
RES I¾Schmitt Trigger reset input. Active low.
VDD ¾¾
Positive power supply
VSS ¾¾ Negative power supply, ground
Note 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. Only pins PA0~PA3 have a pull-high configuration option. This pull-high option can only be
selected if these four pins are configured as NMOS types. If the pull-high option is selected
then it will apply to all of the PA0~PA3 pins, individual pins cannot be selected to have pull-high
resistors. If setup as CMOS outputs the pull-high configuration option is disabled.
HT49R50A-1/HT49C50-1/HT49C50L
Pin Name I/O Options Description
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
I/O
Wake-up
CMOS or NMOS
Pull-high
PA0/PA1 or BZ/BZ
PA3 or PFD
Bidirectional 8-bit input/output port. Each pin on this
port can be configured as a wake-up input by a con-
figuration option. Configuration options determine
whether pins PA0~PA3 are configured as CMOS out-
puts or NMOS input/output pins. If PA0~PA3 are con-
figured as NMOS input/output pins, then pull high
options are available but apply to all 4 pins, not indi-
vidual pins. Pins PA4~PA7 are always configured as
NMOS input/output pins with pull-high resistors con-
nected. Pins PA0, PA1 and PA3 are pin-shared with
BZ, BZ and PFD respectively, the function of which is
chosen via configuration options.
PB0/INT0
PB1/INT1
PB2/TMR0
PB3/TMR1
PB4~PB7
I¾
8-bit input Schmitt Trigger port. Each input pin is con-
nected to an internal pull-high resistor. Pins PB0 and
PB1 are pin-shared with INT0 and INT1 respectively.
Pins PB2 and PB3 are pin-shared with TMR0 and
TMR1 respectively.
PC0~PC3 I/O CMOS or NMOS
Pull-high
Bidirectional 4-bit input/output port. A configuration
option determines whether all four pins PC0~PC3 are
configured as CMOS outputs or NMOS input/output
pins. Individual pins cannot be selected to be config-
ured as a CMOS output or as an NMOS input/output
pin. If PC0~PC3 are configured as NMOS input/out-
put pins, then a pull high option is available but it ap-
plies to all 4 pins, not individual pins.
VLCD I ¾LCD power supply for HT49R50A-1/HT49C50-1.
LCD voltage pump for HT49C50L.
Chapter 1 Hardware Structure
9

Pin Name I/O Options Description
V2 I ¾LCD voltage pump for HT49R50A-1/HT49C50-1.
LCD power supply for HT49C50L.
V1, C1, C2 I ¾LCD voltage pump
COM0~COM2
COM3/SEG32 O1/2, 1/3 or 1/4 Duty
The 1/4 LCD duty cycle configuration option will de-
termine whether pin COM3/SEG32 is configured as a
SEG32 segment driver or as a common COM3 output
driver for the LCD panel. COM0~COM2 are the LCD
common outputs.
SEG0~SEG31 O ¾LCD driver outputs for LCD panel segments
OSC1
OSC2
I
OCrystal or RC
OSC1 and OSC2 are connected to an external RC
network or external crystal (determined by configura-
tion option) for the internal system clock. For external
RC system clock operation, OSC2 is an output pin for
1/4 system clock. If an RTC oscillator on pins OSC3
and OSC4 is used as a system clock, then the OSC1
and OSC2 pins should be left floating.
OSC3
OSC4
I
O
RTC or
System Clock
OSC3 and OSC4 are connected to a 32768Hz crystal
to form a real time clock for timing purposes or to form
a system clock.
RES I¾Schmitt Trigger reset input. Active low.
VDD ¾¾ Positive power supply
VSS ¾¾ Negative power supply, ground
Note 1. Each pin on PA can be programmed through a configuration option to have a wake-up function.
2. Only pins PA0~PA3 and PC0~PC3 have a pull-high resistor configuration option. These
pull-high options can only be selected if these four pins are configured as NMOS types. If the
pull-high option is selected then it will apply to all four pins, individual pins cannot be selected to
have pull-high resistors. If setup as CMOS outputs the pull-high configuration option is dis-
abled.
3. Due to packaging limitations on the 48-pin SSOP package, I/O pins PB6 and PB7, Port C pins
and LCD segment pins SEG0~SEG9 and SEG28~SEG31 are not present.
10
LCD Type MCU

HT49R70A-1/HT49C70-1/HT49C70L
Pad Name I/O Options Description
PA0/BZ
PA1/BZ
PA2
PA3/PFD
PA4~PA7
I/O
Wake-up
CMOS or NMOS
Pull-high
PA0/PA1 or BZ/BZ
PA3 or PFD
Bidirectional 8-bit input/output port. Each pin on this
port can be configured as a wake-up input by a con-
figuration option. Configuration options determine
whether pins PA0~PA3 are configured as CMOS out-
puts or NMOS input/output pins. If PA0~PA3 are con-
figured as NMOS input/output pins, then pull high
options are available but apply to all 4 pins, not indi-
vidual pins. Pins PA4~PA7 are always configured as
NMOS input/output pins with pull-high resistors con-
nected. Pins PA0, PA1 and PA3 are pin-shared with
BZ, BZ and PFD respectively, the function of which is
chosen via configuration options.
PB0/INT0
PB1/INT1
PB2/TMR0
PB3/TMR1
PB4~PB7
I¾
8-bit Schmitt Trigger input port. Each input pin is con-
nected to an internal pull-high resistor. Pins PB0 and
PB1 are pin-shared with INT0 and INT1 respectively.
Pins PB2 and PB3 are pin-shared with TMR0 and
TMR1 respectively.
PC0~PC7 I/O CMOS or NMOS
Pull-high
Bidirectional 8-bit input/output port. Two configura-
tion options determine whether the four pins
PC0~PC3 and the four pins PC4~PC7 are configured
as CMOS outputs or NMOS input/output pins. Pins
must be configured as CMOS outputs or NMOS in-
put/output pins in blocks of four pins, individual pins
cannot be selected. If pins PC0~PC3 or PC4~PC7
are configured as NMOS input/output pins, then a pull
high option is available for each block of four pins. In-
dividual pins cannot be selected to have a pull-high
option.
VLCD I ¾LCD power supply for HT49R70A-1/HT49C70-1.
LCD voltage pump for HT49C70L.
V2 I ¾LCD voltage pump for HT49R70A-1/HT49C70-1.
LCD power supply for HT49C70L.
V1, C1, C2 I ¾LCD voltage pump
COM0~COM2
COM3/SEG40 O1/2, 1/3 or 1/4 Duty
The 1/4 LCD duty cycle configuration option will de-
termine whether pin COM3/SEG40 is configured as a
SEG40 segment driver or as a common COM3 output
driver for the LCD panel. COM0~COM2 are the LCD
common outputs.
SEG0~SEG39 O ¾LCD driver outputs for LCD panel segments
Chapter 1 Hardware Structure
11