Following pin definitions are used only when COMBO I/II mode with separate MICROWIRE com-

patible serial control port is selected. (MS input set equal one)

PIN FUNCTIONS (continued)

Pin

Name

Description

12

CO

Control data Output: Serial control/status information is shifted

out from the PIAFE on this pin when CS- is low on the falling

odges of CCLK.

13

CI

Control data Input: Serial Control information is shifted into the

PIAFE on this pin when CS- is low on the rising edges of CCLK.

19

CCLK

Control Clock input: This clock shifts serial control information

into CI and out from CO when the CS- input is low, depending

on the current instruction. CCLK may be asynchronous with the

other system clocks.

20

CS-

Chip Select input: When this pin is low, control information is

written into and out from the PIAFE via CI and CO pins.

Following pin definitions are used only when the GCI mode is selected. (MS input set equal zero)

PIN FUNCTIONS (continued)

Pin

Name

Description

19,13,12,20

A0,A1,A2,A3

These pins select the address of PIAFE on GCI interface and

C4,C5,C6,C7 bits of the first address byte respectively.

ST5080A

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