Motorola GM328 Service Manual page 29

Notes For All Schematics and Circuit Boards
ON OFF SENSE (Controller)
OPT CS
OPT PTT
PA PWR SET
PA SWB
PA SUPVLTG
PCIC MOSBIAS 1
PRESC
PTT IRDEC
PTT IRDECODER
R W
RAM CS
RDY
REF CS
RESET
ROW x
RSSI
RX ADAPT
RX AUD RTN
RX FLAT FILTERED AUDIO
RXIN
RXINJ
SCI RX
SCI TX
SPI
SPKR-
SPKR+
Service Request Line from Control Head
Option Board Chip Select
PTT from Option Board
ASFIC Output Voltage to set the Transmitter Power
Switches Supply Voltage for PA Current Control Circuitry
13.2 V Supply Voltage of the Transmitter PA
PA Bias Voltage for first Stage
Prescaler Signal from VCO to Synthesizer
Microphone PTT Input
Microphone PTT Input
Read Write Signal for RAM / Flash
RAM Chip Select
Service Request Line from Option Board
Reference Chip Select (not used)
Reset Line
Keypad Matrix Row x
Received Signal Strength Indicator
Flat TX Path Disable during Transmitter Key-up
Option Board Input / Output of Receiver Audio Path
Flat or Filtered Audio to Accessory Connector
RF Signal from Antenna Switch into the Receiver
RF Signal from the VCO into the Mixer
Serial Communication Interface Receive Line
Serial Communication Interface Transmit Line
Serial Peripheral Interface Bus
Negative Audio PA Speaker Output
Positive Audio PA Speaker Output
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