Motorola 6864115B62-C Detailed Service Manual page 20

2-8
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+
SQ DET
SYN
TEMP SENSE
TEMPSENSE
TRB
TX AUD RTN
TX AUD SND
TXINJ
U DRIVER
U PREDRIVER
UNSW 5V
URX SND
VAG
VCOBIAS 1
VCOBIAS 2
VCOMOD
VCTRL
VDDA
VOLTAGE SENSE
VOLUME
VOX
VPP
VS AUDIOSEL
VS GAINSEL
VS INT
RAM Ship 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
Squelch Detect Signal
*P Clock Signal
Temperature Sense Line for LCD
Temperature Sense Line from PA to *P
TX/RX VCO Switch Signal
Option Board Output to Transmit Audio Path
Microphone Audio to Option Board
RF Signal from the VCO into the Transmitter PA
Supply Voltage for PA Driver
Supply Voltage for PA Pre-driver
Permanent 5V Supply
Filtered Audio Signal to Option Board
2.5V Reference Voltage for Analog Circuitry
Switch Signal from Synthesizer
Switch Signal from Synthesizer
Modulation Signal into VCO
VCO Frequency Control Voltage
Regulated 5V for Digital Circuitry in RF Section
Voltage Sense Line from LCD
Volume Pot Output
Voice Operated Transmit Level
Boot Mode Select
Switch Signal to Enable Option Board Audio Output Signal
Voice Storage Gain Select Line
Voice Storage Interrupt Line
MAINTENANCE