ZiLOG eZ80F92, User Manual

Page: 22 / 90

eZ80F92 Development Kit
User Manual
Operational Description PRELIMINARY UM013904-0203
12
Table 2. eZ80
®
Development Platform
Peripheral Bus Connector Identification—JP1*
Pin # Symbol Signal Direction Active Level eZ80F92 Signal
2
1 A6 Bidirectional Yes
2 A0 Bidirectional Yes
3 A10 Bidirectional Yes
4 A3 Bidirectional Yes
5 GND
6 V
DD
7 A8 Bidirectional Yes
8 A7 Bidirectional Yes
9 A13 Bidirectional Yes
10 A9 Bidirectional Yes
11 A15 Bidirectional Yes
12 A14 Bidirectional Yes
13 A18 Bidirectional Yes
14 A16 Bidirectional Yes
15 A19 Bidirectional Yes
Notes:
1. For the sake of simplicity in describing the interface, Power and Ground nets are omitted from
this table. The entire interface is represented in the eZ80F92 Module Schematics on pages 62
through 64 .
2. The Power and Ground nets are connected directly to the eZ80F92 device.
3. External capacitive loads on RD, WR, IORQ, MREQ, D0–D7 and A0–A23 should be below 10pF
to satisfy the timing requirements for the eZ80
®
CPU. All unused inputs should be pulled to
either V
DD
or GND, depending on their inactive levels to reduce power consumption and to
reduce noise sensitivity. To prevent EMI, the EZ80CLK output can be deactivated via software in
the eZ80F91’s Peripheral Power-Down Register.