Application Module Interface - ZiLOG eZ80F92 User Manual

eZ80F92 Development Kit
User Manual
20
Note:

Application Module Interface

Operational Description
These three inputs are:
•
Disable Flash (DIS_Flash)*
•
Flash Write Enable (FlashWE)*
•
Disable IrDA (DIS_IrDA)
These three signals are described below.
Disable Flash*
When active Low, the DIS_Flash input signal disables the Flash chip on
the eZ80F92 Flash Module.
Flash Write Enable*
When active Low, the FlashWE input signal enables Write operations on
the Flash boot block of the eZ80F92 Flash Module.
Disable IrDA
When the DIS_IrDA input signal is pulled Low, the IrDA transceiver,
located on the eZ80F92 Flash Module, is disabled. As a result, UART0
can be used with the RS232 or the RS485 interfaces on the eZ80
opment Platform.
*These inputs are only used if external Flash is present on the eZ80F92
Flash Module (as shipped from the factory, external Flash is not
installed).
An Application Module Interface is provided to allow the user to add an
application-specific module to the eZ80
ZiLOG's Thermostat Application Module (not provided in the kit) is an
example application-specific module that demonstrates an HVAC control
system. Implementing an application module with the Application Mod-
ule Interface requires that the eZ80F92 Flash Module also be mounted on
®
Development Platform.
PRELIMINARY
®
Devel-
UM013904-0203