J4 Signal Descriptions; General; Misc. Signals, Ttl Levels; Ethernet, Rs422 Levels - Motorola CPV5000 Installation And Reference Manual

J4 Signal Descriptions

General

VCC - 5v power
GND - to digital signal ground plane
NC - no connect
RESERVED - do not connect to

Misc. Signals, TTL levels

BTI* - LM78 pin 38 BTI# digital input (see National Semiconductor LM78 datasheet:
http://www.national.com)
PBYPASS* - LM78 pin 16 PBYPASS# output
FAN[3:2] - LM78 fan tach inputs 3..2
OPEN* - latched input (use N.O. switch), reset by LM78 register, LM78 pin 15
SSDA - LM78 I2C serial data I/O
SSCL - LM78 I2C serial clock input

Ethernet, RS422 levels

ERX+/- - differential receive line pair (CPV5000 requires transformer to connect to
network)
ETX+/- - differential transmit line pair (CPV5000 requires transformer to connect to
network)
EACT* - Ethernet activity LED signal, TTL active low
ELINK* - Ethernet link LED signal, TTL active low

EIDEb (ATA-2), TTL levels

IOCS16*b - indicates a 16 bit register has been decoded
DMARQb - drive DMA request
DMAK*b - drive DMA acknowledge
DIOR*b - drive I/O read
DIOW*b - drive I/O write
DASP*b - drive active/slave present
Connectors J4 and J5
3-9
3