Zilog EZ80190 - Manual (Page 24)

eZ80190 Development Kit
User Manual
eZ80Acclaim! Development Platform UM014108-0810
20
•
Disable Ethernet (DIS_ETH)
•
Enable Flash (EN_FLASH)
•
Flash Write Enable (FlashWE)
•
Disable IrDA (DIS_IrDA—not used)
These four signals are described below.
Disable Ethernet
When active Low, the DIS_ETH output signal disables the EMAC from
responding to CPU requests. As a result, additional input/output or mem-
ory devices can be used in the CS3 address space. The logic that disables
the Ethernet signal is listed in
Appendix A on page 74.
Disable Flash
When active Low, the EN_FLASH input signal disables the Flash chip on
the eZ80190 Module.
Flash Write Enable
When active Low, the FlashWE input signal enables Write operations on
the Flash boot block of the eZ80190 Module.
Disable IrDA
This signal does not perform a function on the eZ80190 Module. UART0
is always used with the RS232 interface on the eZ80Acclaim!
® Develop-
ment Platform.
Application Module Interface
An Application Module Interface is provided to allow the user to add an
application-specific module to the eZ80Acclaim!
® Development Platform.
ZiLOG’s Thermostat Application Module (not provided in the kit) is an
example application-specific module that demonstrates an HVAC control
system.