Fujitsu F2MC-8FX MB95200H/210H Series Installation and operating instructions

Fujitsu Microelectronics (Shanghai) Co., Ltd.
Application Note
MCU-AN-500009-E-10
F²MC-8FX FAMILY
8-BIT MICROCONTROLLER
MB95200H/210H SERIES
HOW TO USE DBG PIN
APPLICATION NOTE

DBG pin operation V1.0
Revision History
MCU-AN-500009-E-10 – Page 2
Revision History
Date Author Change Records
2008-03-18 Raven Peng V1.0 First draft
This manual contains 12 pages.
© 2008 Fujitsu Microelectronics (Shanghai) Co., Ltd. All rights reserved
1. The products and specifications described in this manual may be changed without prior notice. To obtain
the latest information and/or specifications, contact your Fujitsu sales representative or Fujitsu authorized
distributor.
2. Fujitsu will not be liable for infringement of copyright, industrial property right, or other rights of a third party
caused by the use of information or schematic diagrams described in this manual.
3. The contents of this manual may not be transferred or copied without written permission of Fujitsu.
4. The products described in this manual are not intended for the use of equipment which requires extremely
high reliability such as aerospace equipment, undersea repeaters, nuclear control systems or medical
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5. Some of the products described in this manual may be strategic materials (or special technology) as defined
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DBG pin operation V1.0
CONTENTS
MCU-AN-500009-E-10 – Page 3
CONTENTS
REVISION HISTORY............................................................................................................ 2
CONTENTS .......................................................................................................................... 3
1 INTRODUCTION.............................................................................................................. 4
2 FUNCTION OF DBG PIN ................................................................................................. 5
2.1 DBG pin hardware connection (debug mode).......................................................... 5
2.2 Performance in debug mode ................................................................................... 5
2.3 Performance in free-run mode................................................................................. 5
3 HOW TO USE DBG PIN................................................................................................... 6
3.1 Used as 1-line UART pin / P12 pin .......................................................................... 6
3.2 Used as EC0 pin ..................................................................................................... 6
4 PRECAUTIONS ON USING DBG PIN ............................................................................. 7
5 SAMPLE CODE ............................................................................................................... 8

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Chapter 1 Introduction
MCU-AN-500009-E-10 – Page 4
1 Introduction
This application note describes how to use DBG pin. The DBG pin can be used as 1-line
UART communication port in debug mode and can be used as P12/EC0 in free-run mode.

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Chapter 2 Function of DBG pin
MCU-AN-500009-E-10 – Page 5
2 Function of DBG pin
This chapter explains functions of DBG pin in different modes.
2.1 DBG pin hardware connection (debug mode)
Figure 2-1 DBG Pin Hardware Connection in Debug Mode
2.2 Performance in debug mode
DBG pin is used as 1-line UART pin when target MCU enter into debug mode. To ensure
real time communication with BGM Adapter, other functions of DBG pin are disabled.
The function of P12 is disabled. Any operation for P12 in user code is not effective.
EC0 is also disabled. Another pin can be used as EC0 pin. “1” is written to SYSC [EC0SL] to
select P04/EC0 pin as external counter clock input. Do not set P04 pin as EC0 input and
HCLK1 input at the same time.
2.3 Performance in free-run mode
1-line UART function is disabled when target MCU enter into free-run mode. P12/EC0 can
be used in user code. But DBG pin can not be set as 1-line UART pin in user code.

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Chapter 3 How to Use DBG Pin
MCU-AN-500009-E-10 – Page 6
3 How to Use DBG Pin
This chapter gives some examples for DBG pin setting in different modes.
3.1 Used as 1-line UART pin / P12 pin
In Debug mode, DBG pin is used as 1-line UART pin automatically. DBG pin keeps high
when UART is in idle status. In free-run mode, DBG pin is used as P12 by default. When the
following user code are written,
DBG pin still keeps high level after running user codes above in debug mode. DBG pin is
pulled to low level after running these codes in free-run mode.
3.2 Used as EC0 pin
DBG pin cannot be used as EC0 pin in debug mode. To realize the external clock input for
8/16 compound timer, EC0 pin can be changed to P04 pin in debug mode.
P04 is set as EC0 pin in sample code above and T00 is set in continuous interval timer
mode. Execute the following operations by order, Input a clock signal to P04 pin → run these
codes in debug mode → check T00 pin; then output clock can be used as input clock divided
by 8.
P12 is set as EC0 pin in sample code above and T00 is set in continuous interval timer
mode. Execute the following operations by order, Input a clock signal to P12 pin → run these
codes in free-run mode → check T00 pin, then output clock can be usde input clock divided
by 8.
SYSC = 0xE3; // set P12 as EC0 pin, disable HCLK1
T00CR0 = 0x71; // interval timer, external clock source.
TMCR0 = 0x43; // 8bit mode, output T00.
T00DR = 0x08; // set counter.
T00CR1 = 0x81;
/
/
enable output, start
T
00
.
SYSC = 0xEB; // set P04 as EC0 pin, disable HCLK1
T00CR0 = 0x71; // interval timer, external clock source.
TMCR0 = 0x43; // 8 bit mode, output T00.
T00DR = 0x08; // set counter.
T00CR1 = 0x81;
/
/
enable output, start
T
00
.
DDR1_D12 = 1; // set P12 as output pin
PDR1_P12 = 0; // pull P12 to low.

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Chapter 4 Precautions on using DBG pin
MCU-AN-500009-E-10 – Page 7
4 Precautions on using DBG pin
This chapter describes precautions on using DBG pin.
1. The peripheral circuit connected to DBG pin shouldn’t affect 1-line UART communication
when using BGM Adapter for debugging. Please refer to Figure 2-1 when designing user
board.
2. It is recommended that P12 is set as input pin or output low level in user code instead of
output high level when debugging. DBG pin will be set as output high when target MCU runs
in free-run mode, if P12 is set as output high level. A large current will pass through DBG pin
when BGM adapter transfer “0” with 1-line UART pin if target board is connected to BGM
adapter on this condition.

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Chapter 5 Sample code
MCU-AN-500009-E-10 – Page 8
5 Sample code
Start.asm
//==================================================================
// F
2
MC-8L Family SOFTUNE C Compiler sample startup routine,
// ALL RIGHTS RESERVED, COPYRIGHT (C) FUJITSU LIMITED 1986
// LICENSED MATERIAL - PROGRAM PROPERTY OF FUJITSU LIMITED
//==================================================================
//Sample code for initialization
//-----------------------------------------------------------------------
.PROGRAM start
.TITLE start
// Settings
#set OFF 0
#set ON 1
# set STACKSIZE 64 // Stack size
//Clock Mode Selection
# set SUB 0 //Sub clock mode
# set MAIN 2 // Main clock mode
//DIV Clock Selection (Machine clock division ratio)
# set CLK_0 0 // Original oscillator div 1
# set CLK_4 1 // Original oscillator div 4
# set CLK_8 2 //Original oscillator div 8
# set CLK_16 3 //Original oscillator div 16
// external declaration of symbols
.EXPORT __start
.IMPORT _main
//definition to stack area
.SECTION STACK, STACK, ALIGN=1
.RES.B STACKSIZE
STACK_TOP:
.RES.B 2
//========= ===============================================
// Start-Up Code
//=======================================================
// ___ _____ __ ___ _____
// / | / \ | \ |
// \___ | | | |___/ |
// \ | |----| | \ |

DBG pin operation V1.0
Chapter 5 Sample code
MCU-AN-500009-E-10 – Page 9
// ___/ | | | | \ |
//Begin of actual code section
//========================================================
//The Mode Byte is defined at the beginning of the start.asm
.SECTION RESVECT, CONST, LOCATE=H'FFFD
.DATA.B 0
.DATA.W __start
; code area
.SECTION CODE, CODE, ALIGN=1
__start:
; set stack pointer
MOVW A , #STACK_TOP
MOVW SP , A
// Set Register bank Pointer 0 / set Direct bank Pointer 0 (0x80..0xFF)
MOVW A , PS
MOVW A , #0x00BF // RP=0, DP=0, I=0
ANDW A
MOVW PS , A
// Set ILM to the lowest level(3)
MOVW A , PS
MOVW A , #0x0030
ORW A
MOVW PS , A
MOV A , 0X0FE4 // READ CRTH
AND A , #0X9F //CLEAR CRTH[6:5]
OR A , #0X60 // 10MHz, 0X00: 1MHz
//0X20: 12.5MHz
// 0X40: 10MHz 0X60: 8MHz
MOV 0X0FE4 , A // WRITE SYSC
// call main routine
CALL _main
end: JMP end
.END __start

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Chapter 5 Sample code
MCU-AN-500009-E-10 – Page 10
vector.c
/******************************vector.c*********************************/
THIS SAMPLE CODE IS PROVIDED AS IT IS AND IS SUBJECT TO ALTERATIONS. FUJITSU
MICROELECTRONICS ACCEPTS NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR
INFRINGEMENT FOR ANY PURPOSES.
/********************************************************************/
// VECTORS.C Interrupt level (priority) setting
- Interrupt vector definition
#include "mb95200.h"
void InitIrqLevels(void)
{ ILR0 = 0xEF; // IRQ0: external interrupt ch4 --> 01
// IRQ1: external interrupt ch5 --> 01
// IRQ2: external interrupt ch2 | ch6 --> 01
// IRQ3: external interrupt ch3 | ch7 --> 01
ILR1 = 0xFF; // IRQ4: UART/SIO ch0
// IRQ5: 8/16-bit timer ch0 (lower)
// IRQ6: 8/16-bit timer ch0 (upper)
// IRQ7: LIN-UART (reception)
ILR2 = 0xFF; // IRQ8: LIN-UART (transmission)
// IRQ9: 8/16-bit PPG ch1 (lower) | UART/SIO ch1
// IRQ10: 8/16-bit PPG ch1 (upper) | I2C ch1
// IRQ11: 16-bit reload timer ch0
ILR3 = 0xFF; // IRQ12: 8/16-bit PPG ch0 (upper)
// IRQ13: 8/16-bit PPG ch0 (lower)
// IRQ14: 8/16-bit timer ch1 (upper)
// IRQ15: 16-bit PPG ch0 + ch2
ILR4 = 0xFF; // IRQ16: 16-bit reload timer ch1 | I2C ch0
// IRQ17: 16-bit PPG ch1
// IRQ18: 10-biat A/D-converter --> 01
// IRQ19: Timebase timer
ILR5 = 0xFF; // IRQ20: Watch timer / counter
// IRQ21: external interrupt ch 8-11
// IRQ22: 8/16-bit timer ch1 (lower) | external interrupt ch 12-15
// IRQ23: Flash | Custom ch1
}
// Prototypes
//================================================================
//Add your prototypes, each vector definition needs a prototype. Either do it here or include a header
file containing them.