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Pin Assignments for CPV5350 SBC and CPV5350 TM Backplane Connectors
A
Table A-25. Signal Descriptions for the CPV5350 TM (J5) Backplane
Signal
Floppy Disk
Drive, TTL
Keyboard/
Mouse
Device, TTL
A-32
Connector (Continued)
Signal
Mnemonic
DSKCHG-
DIR-
levels
DRVDENS
[1:0]
DS[1:0]-
HDSEL-
INDEX-
MTR[1:0]-
RDATA-
STEP-
TR0
WDATA-
WGATE-
WPROT-
MCLK
MDAT
KBDCLK
levels
KBDDAT
Signal Description
indicates drive door is open
controls direction of the head during step operations
disk density select communication
drive selects
selects top or bottom side head
indicates the beginning of a track
motor enables
data read
step, pulses move head in or out
indicates head is positioned above track 00
write data to drive
enables head write circuitry of drive
indicates a disk is write-protected
clock for PS/2 mouse
serial data line for PS/2 mouse
clock for PC/AT or PS/2 keyboard
serial data line for PC/AT or PS/2 keyboard
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