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RP3000 Circuit Description
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6. Control System
The IC500 CPU operates at 9.8304MHz.
The block diagram of MCU control system is shown as following:
MCU
SAVE
APC/TV
BATT Det
VOL Level
CH Encode
5TC
5RC
W/N
MUTE
T/R
BEEP
LED
AP SW
I/E
RSSI
PTT
KEY SW
TXD/RXD
CTC/CDC Codec
E2PROM
FLASH
AF Processor
PLL IC
RESET
Fig.6 MCU Block Diagram
Circuit in this section is mainly comprised of MCU, EEPROM, FLASH and reset IC etc.
MCU control circuit accomplishes the following functions: accomplish the reset initialization
according to the programmed feature of the radio when power on; detect key signal and monitor
battery voltage; send necessary frequency data to PLL according to encode of the channel; switch
and control transmit/receive according to the signal input from PTT; turn on/off the mute circuit
according to the input signaling decode signal and squelch level signal; output control signal to
control the light/off of LED; control signaling process IC to perform tasks.
Содержание RP3000
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