CL-PS7500FE View Datasheet(PDF) - Cirrus Logic

Part Name

Description

Manufacturer

CL-PS7500FE

System-on-a Chip for Internet Appliance

Cirrus Logic 

CL-PS7500FE

System-on-a-Chip for Internet Appliance

10.3.3

KBDCR (0x08) — Keyboard Control

76543210

T TRREPDC

T

R

E

P

D

C

Write

Read

transmit status

receive status

enable

received parity

data pin status

clock pin status

bits[7:4, 2] ignored

bit[3] enable:

0

state machine cleared

1

state machine enabled

bit[1] force KBDATA pin low:

0

don't force low

1

force low

bit[0] force KBCLK pin low:

0

don't force low

1

force low

bit[7] TXE shift register empty:

0

not ready

1

enabled and ready to transmit

bit[6] TXB, transmitter busy:

0

not busy

1

currently sending data

bit[5] RXF, receive shift register full:

0

not full

1

ready to read

bit[4] RXB, receiver busy:

0

not busy

1

currently receiving data

bit[3] ENA, state machine enable:

0

disabled

1

enabled

bit[2] RXP, receive parity bit, odd parity bit for last received data

bit[1] SKD, KBDATA pin value after synchronization

bit[0] SKC, KBCLK pin value after synchronization

82

MEMORY AND I/O PROGRAMMERS’ MODEL

ADVANCE DATA BOOK v2.0

June 1997

Share Link: