Zilog EZ80F916 - Manual (Page 10)

eZ80F91 Modular Development Kit
User Manual
UM017010-0112 eZ80Acclaim! MDS Adapter Board
5
eZ80Acclaim! MDS Adapter Board
This chapter describes the functions of the eZ80Acclaim! MDS Adapter
Board.
eZ80F91 Module Interface
The eZ80F91 Module interface on the eZ80Acclaim! MDS Adapter
Board consists of two 56-pin mini-module receptacles.
Almost all of these receptacles’ signals are connected directly to the CPU.
Three input signals offer options by disabling certain functions of the
eZ80F91 Module.
These three input signals are:
Disable IrDA (DIS_IrDA). Used only if you have installed an external SIR
IrDA transceiver onto the eZ80F91 Module. When the DIS_IrDA input
signal is pulled Low, the IrDA transceiver located on the eZ80F91 Mod-
ule is disabled. As a result, UART0 can be used with RS-232 or RS-485
interfaces on the eZ80 development platform.
F91_WE. When the F91_WE signal is active Low, internal Flash on the
eZ80F91 chip is enabled for writing. This signal is inverted from the
F91_WP signal on the eZ80F91 chip.
RTC_VDD. Test point for the Real-Time Clock power supply.
Peripheral Bus Mini-Module Connector J1
Figure 3 displays the pin layout of 56-pin Peripheral Bus Mini-Module
Connector, J1, on the eZ80Acclaim! MDS Adapter Board. Table 1 lists
the pins and their functions.