Zilog EZ80F91 - Manual (Page 45)

eZ80F91 Development Kit
User Manual
UM014220-0508 eZ80 Development Kit
40
Jumper J20
The J20 jumper connection controls the selection of the external chip
select in the external application module. When the shunt is placed, the
external chip select signal, CS_EX, is disabled. See
Table 27 .
Connectors
A number of connectors are available for connecting external devices
such as the ZPAK II Debug Tool, PC serial ports, external modems, the
console, and LAN/telephone lines.
J6 and J8 are the headers, or connectors, that provide pin-outs to connect
any external application module, such as Zilog’s Thermostat Application
Module.
Connector J6
The J6 connector provides pin-outs to make use of GPIO functionality.
Connector J8
The J8 connector provides pin-outs to access memory and other control
signals.
Table 27. J20—EX_FL_DIS
Shunt
Status
Function Affected Device
IN The jumper for EX_FL_DIS is IN. The chip select on the application module
is disabled.
OUT The jumper for EX_FL_DIS is OUT. The chip select on the application module
is enabled.