ZiLOG eZ80F91 User manual

ZiLOG W orldwide Headquarters • 532 Race Street • San Jose, CA 95126
T elephone: 408.558.8500 • Fax: [phone] • www .ZiLOG.com
PRELIMINARY
UM014210-1003
eZ80F91 Dev elopment Kit
User Manual

eZ80F91 Development Kit
User Manual
PRELIMINARY UM014210-1003
ii
This publication is subject to replacement by a later edition. T o determine whether a later
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T elephone: 408.558.8500
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www .zilog.com
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eZ80F91 Development Ki t
User Manual
UM014210-1003 PRELIMINARY Safeguards
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Saf eguards
The follo wing precautions must be observ ed when w orking with the
de vices described in this document.
Al w ays use a grounding strap to pre v ent damage resulting from
electrostatic dischar ge (ESD).
Caution:

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eZ80F91 Development Ki t
User Manual
UM014210-1003 PRELIMINARY Table of Contents
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T able of Contents
Safeguards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii i
L ist of Figures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
List of Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Kit Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
eZ80F91 Development Kit Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
eZ80
®
Development Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
eZ80F91 Module Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Application Module Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
I/O Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Embedded Modem Socket Interface . . . . . . . . . . . . . . . . . . . . . . . 27
eZ80®Development Platform Memory . . . . . . . . . . . . . . . . . . . . . 30
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Modem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
I2C Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
eZ80F91 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Fast Buffer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Operational Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

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eZ80F91 Module Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Reset Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
IrDA Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Flash Loader Utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Mounting the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Changing the Power Supply Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
ZPAKII. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
ZDI Target Interface Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
JTAG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Application Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
ZDS II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Cannot Download Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
IrDA Port Not Working . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Contacting ZiLOG Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . 59
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
eZ80®Development Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
eZ80F91 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Appendix A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
General Array Logic Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
U10 Address Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
U15 Address Decoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Customer Feedback Form. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

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List of Figures
Figure 1. eZ80®Development Platform Block Diagram with eZ80F91
Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 2. The eZ80®Development Platform . . . . . . . . . . . . . . . . . . . 5
Figure 3. The eZ80F91 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Basic eZ80®Development Platform Block Diagram . . . . . 8
Figure 5. Physical Dimensions of the eZ80®Development Platform 9
Figure 6. eZ80®Development Platform Peripheral Bus Connector
Pin Configuration—JP1 . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 7. eZ80®Development Platform I/O Connector Pin
Configuration—JP2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 8. Trigger Pins J21 and J22 . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 9. Embedded Modem Socket Interface—J1, J5, and J9 . . . . 28
Figure 10. Memory Map of the eZ80®Development Platform and
eZ80F91 Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 11. Possible Bus Contention without Fast Buffer . . . . . . . . . . 45
Figure 12. Physical Dimensions of the eZ80F91 Module . . . . . . . . . 47
Figure 13. eZ80F91 Module—Top Layer . . . . . . . . . . . . . . . . . . . . . 48
Figure 14. eZ80F91 Module—Bottom Layer . . . . . . . . . . . . . . . . . . . 49
Figure 15. IrDA Hardware Connections . . . . . . . . . . . . . . . . . . . . . . . 52
Figure 16. 9VDC Universal Power Supply Components . . . . . . . . . . 54
Figure 17. Inserting a New Plug Configuration . . . . . . . . . . . . . . . . . 55
Figure 18. eZ80®Development Platform Schematic Diagram,
#1 of 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figure 19. eZ80®Development Platform Schematic Diagram,
#2 of 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Figure 20. eZ80®Development Platform Schematic Diagram,
#3 of 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

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Figure 21. eZ80®Development Platform Schematic Diagram,
#4 of 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 22. eZ80®Development Platform Schematic Diagram,
#5 of 5—RS-485 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 23. eZ80F91 Module Schematic Diagram, #1 of 3—Connectors
and Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 24. eZ80F91 Module Schematic Diagram, #2 of 3—CPU and
PHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 25. eZ80F91 Module Schematic Diagram, #3 of 3—Module
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

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UM014210-1003 PRELIMINARY List of Tables
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List of Tables
Table 1. eZ80®Development Platform Hardware Specifications . . 2
Table 2. eZ80®Development Platform Peripheral Bus Connector
Identification—JP11,3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 3. eZ80®Development Platform I/O Connector Identification—
JP21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 4. Jumper, eZ80F91 Module . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 5. GPIO Connector J6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 6. CPU Bus Connector J8 . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 7. LED and Port Emulation Addresses . . . . . . . . . . . . . . . . . 25
Table 8. LED Anode/GPIO Output Control Register . . . . . . . . . . . 25
Table 9. GPIO Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 10. Connector J5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 11. Connector J9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 12. Connector J1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 13. Chip Select Wait States . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 14. Bit Access to the LED Cathode, Modem, and Triggers . . 34
Table 15. J2—DIS_IrDA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 16. J3—DIS_EM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 17. J7—FlashWE (Off-Chip) . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 18. J11—EN_FLASH (Off-Chip) . . . . . . . . . . . . . . . . . . . . . . 37
Table 19. J12—5VDC/3.3VDC for an Embedded Modem . . . . . . . 38
Table 20. J14—RI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 21. J15—RS485_1_EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 22. J16—RS485_2_EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 23. J17—RT_1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 24. J18—RT_2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 25. J19—EX_SEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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Table 26. J20—EX_FL_DIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 27. I2C Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

eZ80F91 Development Kit
User Manual
UM014210-1003 PRELIMINARY Introduction
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Introduction
The eZ80F91 Development Kit provides a general-purpose platform for
evaluating the capabilities and operation of ZiLOG’s eZ80F91 microcon-
troller. The eZ80F91 is a member of ZiLOG’s eZ80Acclaim! product
family, which offers on-chip Flash capability. The eZ80F91 Development
Kit features two primary boards: the eZ80®Development Platform and
the eZ80F91 Module. This arrangement provides a full development plat-
form when using both boards. It can also provide a smaller-sized refer-
ence platform with the eZ80F91 Module as a stand-alone development
tool.
Kit Features
The key features of the eZ80F91 Development Kit are:
• eZ80®Development Platform:
–Up to 2MB fast SRAM (12ns access time; 1MB factory-
installed, with 512KB on module, 512KB on platform)
–Embedded modem socket with a U.S. telephone line interface
– I2CEEPROM
– I2Cconfiguration register
– GPIO, logic circuit, and memory headers
–Supported by ZiLOG Developer Studio II and the eZ80®C-
Compiler
–LEDs, including a 7x5 LED matrix
– Platform configuration jumpers
– Two RS232 connectors—console, modem
–RS485 connector with cable assembly
–ZiLOG Debug Interface (ZDI)

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– JTAG Debug Interface
– 9VDC power connector
– Telephone jack
• eZ80F91 Module:
–eZ80F91 device operating at 50MHz, with 256KB of internal
Flash memory and 8KB of internal SRAM memory
–512KB of off-chip SRAM memory
– 1MB of off-chip Flash memory (footprint)
– On-chip Ethernet Media Access Controller (EMAC)
–Ethernet port
– IrDA port
–Real-Time Clock with battery backup
– Two headers compatible with the eZ80®Development Platform
• ZPAKII Debug Tool
• eZ80®Software and Documentation CD-ROM
Hardware Specifications
Table 1 lists the specifications of the eZ80®Development Platform.
Table 1. eZ80®Development Platform
Hardware Specifications
Operating Temperature: 20ºC ±5ºC
Operating Voltage: 9 VDC

eZ80F91 Development Kit
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UM014210-1003 PRELIMINARY Introduction
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eZ80F91 Development Kit Overview
The purpose of the eZ80F91 Development Kit is to provide the developer
with a set of tools for evaluating the features of the eZ80F91 microcon-
troller and to be able to develop a new application before building appli-
cation hardware.
The eZ80®Development Platform is designed to accept a number of
application-specific modules and eZ80®-based add-on modules, including
the eZ80F91 Module featured in this kit.
The eZ80®Development Platform, together with its plugged-in eZ80F91
Module, can operate in stand-alone mode with Flash memory, or interface
via the ZPAKII Debug Tool to a host PC running ZiLOG Developer Stu-
dio II Integrated Development Environment (ZDS IDE) software.
The address bus, data bus, and all eZ80F91 Module control signals are
buffered on the eZ80®Development Platform to provide sufficient drive
capability.
A block diagram of the eZ80®Development Platform and the eZ80F91
Module is shown in Figure 1.

eZ80F91 Development Kit
User Manual
eZ80F91 Development Kit Overview PRELIMINARY UM014210-1003
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Figure 1. eZ80®Development Platform Block Diagram
with eZ80F91 Module
eZ80
Module
Interface
eZ80F91
GPIO
Address Bus
RS232-0
(Console)
LED
(7x5 matrix)
Embedded
Modem
I C
EEPROM
I C
Register
SRAM
(512 KB
up to 2 MB)
Application Module Headers
2
2
Address Bus
IrDA
Transceiver
Flash
(1 MB)
PHY
SRAM
(512 KB)
External
Battery
RS232-1
(Modem)
RS485_0/1
Connect
®
Data Bus
eZ80F91
Module
Data Bus
GPIO
and
Address
Decoder
GPIO

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UM014210-1003 PRELIMINARY Introduction
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Figure 2 is a photographic representation of the eZ80
®
Development Plat-
form segmented into its key blocks, as shown in the legend for the figure.
Note: Key to blocks A–E.
A. Power and serial communications.
B. eZ80F91 Module interface.
C. JTAG and ZDI debug interfaces.
D. Application module interfaces.
E. GPIO and LED with Address Decoder.
Figure 2. The eZ80®Development Platform
D
E
AB
C

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eZ80F91 Development Kit Overview PRELIMINARY UM014210-1003
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Figure 3 is a photographic representation of the eZ80F91 Module seg-
mented into its key blocks, as shown in the legend for the figure.
The structures of the eZ80®Development Platform and the eZ80F91
Module are illustrated in the Schematic Diagrams starting on page 61.
Note: Key to blocks A–C.
A. eZ80F91 Module interfaces.
B. eZ80F91 CPU.
C. 10/100BaseT Ethernet Interface
D. IrDA transceiver.
Figure 3. The eZ80F91 Module
A
A
C
B
D

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UM014210-1003 PRELIMINARY eZ80®Development Platform
7
eZ80®Development Platform
This section describes the eZ80®Development Platform hardware, its key
components and its interfaces, including programming information such
as memory maps and register definitions.
Functional Description
The eZ80®Development Platform consists of seven major hardware
blocks. These blocks, listed below, are diagrammed in Figure 4.
• eZ80F91 Module interface (2 female headers)
• Power supply for the eZ80®Development Platform, the eZ80F91
Module, and application modules
• Application Module interface (2 male headers)
• GPIO and LED matrix
• Two RS232 serial communications ports
• Two RS485 ports
• Embedded modem interface
• I2Cdevices

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Figure 4. Basic eZ80®Development Platform Block Diagram
eZ80
Module
Interface
RS232-0
(Console)
LED
(7x5 matrix)
Embedded
Modem
I C
EEPROM
I C
Register
SRAM
(512 KB
up to 2 MB)
Application Module Headers
2
2
Address Bus
RS232-1
(Modem)
RS485_0/1
Connect
®
Data Bus
GPIO
and
Address
Decoder
GPIO

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Physical Dimensions
The dimensions of the eZ80®Development Platform PCB is 177.8mm
x182.9mm. The overall height is 38.1mm. See Figure 5.
Figure 5. Physical Dimensions of the eZ80®Development Platform
175.3 mm
43.2 mm
96.5 mm 55.9 mm
114.3 mm
157.5 mm
167.6 mm
5.1 mm
165.1 mm
5.1 mm

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Operational Description PRELIMINARY UM014210-1003
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Operational Description
The eZ80®Development Platform can accept any eZ80®-core-based
modules, provided that the module interfaces correctly to the eZ80®
Development Platform. The purpose of the eZ80®Development Platform
is to provide the application developer with a tool to evaluate the features
of the eZ80F91 device, and to develop an application without building
additional hardware.
eZ80F91 Module Interface
The eZ80®Development Platform provides an easy interface for connect-
ing each of the development modules in the eZ80®family, including the
eZ80F91 Module. The eZ80F91 Module interface consists of two 50-pin
receptacles, JP1 and JP2; a third receptable, JP3, enables the program-
ming of internal on-chip Flash memory. Each is described in the pages
that follow.
Almost all of these receptacles’signals are connected directly to the CPU.
Five input signals, in particular, offer options to the application developer
by disabling certain functions of the eZ80F91 Module.
These five input signals1are:
• Enable Flash (EN_Flash)
• Flash Write Enable (FlashWE)
• Disable IrDA (DIS_IrDA)
• F91_WE
• RTC_VDD
A description of these five signals follows.
1. These input signals are only used if external Flash memory is present on the eZ80F91 Module.
As shipped from the factory, external Flash is not installed.