Motorola GM328 Service Manual page 26

2-6
BL KP RED
BL LCD GREEN
BL LCD RED
BL RED
BOOT CNTRL
BOOT MODE
BOOT PWR ON
BOOT SCI RX
BOOT SCI TX
BOOT VPP
BUS+
BWSELECT
CH ACT
CH KP ID
CH REQUEST
CLK
CNTLVLTG
CNTR AUDIO
COL x
CSX
DATA
DC POWER ON
DISCAUDIO
ECLK
EE CS
EMERGENCY CONTROL
EXP BD REQ
Red Keypad Back Light Control
Green Display Back Light Control
Red Display Back Light Control
Red Back Light Control
Bootstrap Mode Enable Signal
Boot Mode Select
Control Head Switch On Signal
Serial Communication Interface Receive Line
Serial Communication Interface Transmit Line
Boot Mode Select
Bi-directional Serial Communication Line
Signal to select between the Ceramic Filter Pairs
Channel Activity Indicator Signal (Fast Squelch)
Control Head Keypad ID (Data) Lines
Control Head Request from Control Head µP
Clock Signal
PA Power Control Voltage
Audio Lines of the Controller
Keypad Matrix Column x
Chip Select Line PCIC / FRACN
Data Signal
Electronic Switching On or Off of the Radio's Voltage Regulators
Audio Output Signal from the Receiver IC
Clock (not used)
EEPROM Chip Select
Emergency Line to switch on the Radio's Voltage Regulators
Service Request Line from Expansion Board
Notes For All Schematics and Circuit Boards