Zilog EZ80F91 Manual de usuario descargar pdf (Pagina 45)

eZ80F91 Development Kit

User Manual

UM014220-0508 eZ80 Development Kit

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.

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Zilog EZ80F91 Manual de usuario Pagina 45