Mcu Control Section; Control Signal; Signal Detect - HYT TC-610 Service Manual

MCU Control Section

The diagram for the MCU control section is shown below. MCU works on the 7.3728MHz clock
frequency.
1.vox
2.BUSY_DET
3.BEEP/CALL
4.T/R
5.SAVE
6.DC/CTC
7.W/N
8.UART
9.BAT_DET
10.PLL_LD
The MCU control section is composed of MCU, EEPROM, RESET IC, keys, Channel Selector knob, etc.
Main functions realized by this circuit are:
1.

Control Signal:

Control of battery save mode
Control of high/low power select
Control of wide/narrow band select
Control of Tx-Rx switch
Control of APC/TUNE output voltage
Control of Tx power supply and power supply of audio power amplifier
Control of squelch ON detect
2.

Signal Detect

Detect of external PTT, MONI and VOX enable
Detect of PLL unlock (UL)
Detect of VOX ON level
Detect of battery power alert
Detect of external earpiece enable and check
Channel SW
PTT
MON
BAT
U605
MB95F108AK
WPFV-GE1
7.3728M晶体
X601
Figure 9
17
TC-610/620 Service Manual
U609
AT24C64
APC/TUNE
PLL
U610
Reset
IC