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Table A-22. Signal Descriptions for CPV5300 SBC (J5)/CPV5300 TM
Miscellaneous
Keyboard/Mouse
Device, TTL levels
Universal Serial
Bus (USB) (0 and
1), USB levels
Parallel LPT Port,
Serial COM Ports
(1 and 2), RS232
A-28
Pin Assignments for CPV5300 SBC and CPV5300 TM Backplane Connectors
(P5) Backplane Connector Pin Assignments
Signal
Signal
Mnemonic
General
VCC
GND
SPKR
DIAG
PBRESET
RESET
MCLK
MDAT
KBDDAT
UDATAn+
UDATAn-
ACK
TTL levels
BUSY
ERR
PD[7:0]
PE
AFD
INIT
SLIN
STB
SLCT
CTS
DCD
levels
DSR
DTR
Signal Description
5V power supply
digital signal ground plane
PC/AT speaker output, open collector
diagnostic/alarm output, open collector
push button system reset input (pulled up, filtered
and debounced on host card)
system reset output, TTL totem-pole
clock for PS/2 mouse
serial data line for PS/2 mouse KBDCLK - clock for
PC/AT or PX/2 keyboard
serial data line for PC/AT or PS/2 keyboard
(+) signal of differential data pair for USB channel
(-) signal of differential data pair for USB channel
pulsed by peripheral to acknowledge data sent
indicates that printer cannot accept more data
peripheral detected an error
parallel data lines, bits 7- 0
paper end, indicates the printer is out of paper
auto feed, causes printer to line feed
initializes the printer
select in, selects the printer
data strobe, indicates data is valid
select, peripheral indicates it is selected
clear to send
data carrier detected
data set ready
data terminal ready
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