Notes For All Schematics and Circuit Boards 2-7
EXP1 CS Expansion Board Chip Select 1
EXP2 CS Expansion Board Chip Select 2
EXT KP COL External Keypad Matrix Column Signal
EXT KP ROW External Keypad Matrix Row Signal
EXT MIC External (from Accessory Connector) Microphone Input
EXT SWB+ External Switched 13.2V Supply Voltage
F1200 Interrupt Line from ASFIC CMP
FECTRL 1 Control Voltage for Front End Filter
FECTRL 2 Control Voltage for Front End Attenuator Switch
FLASH CS Flash Chip Select
FLASH OE Flash Output Enable
FLAT RX SND Option Board Audio Output Signal
FLAT TX RTN Flat TX Input from Option Board and Accessory Connector
FLT A+ Filtered 13.2 V Supply Voltage
GP x IN General Purpose Input x
GP x IN ACC y General Purpose Input x from Accessory Connector Pin y
GP x IN OUT ACC y General Purpose Input/Output x from Accessory Connector Pin y
GP x OUT General Purpose Output x
GP x OUT ACC y General Purpose Input x from Accessory Connector Pin y
GPIO General Purpose Input Output Lines
HANDSET AUDIO Handset Audio Output
HOOK Hang-up Switch Input
HSIO High Speed Clock In / Data Out
IF First Intermediate Frequency Signal
IGNITION CONTROL Ignition Line to switch on the Radio's Voltage Regulators
IN 5V RF REG Supply Voltage for 5V Regulator in RF Section
INT KP COL Internal Keypad Matrix Column Signal
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