HYT TC-610 User manual

1
CONTENTS
General-------------------------------------------------------------------------------------2
Radio Overview-------------------------------------------------------------------------3
Software Specifications--------------------------------------------------------------7
Circuit Description---------------------------------------------------------------------8
Semiconductor Data----------------------------------------------------------------16
TC-610/620 Parts List 1-------------------------------------------------------------18
(U1) ……………………………………………………………….………….…………
(U2)…………………………………………………………………………….…………
Adjustment------------------------------------------------------------------------------46
Troubleshooting Flow Chart------------------------------------------------------56
Disassembly and Assembly-------------------------------------------------------55
Exploded View-------------------------------------------------------------------------64
TC-610/620 Parts List 2--------------------------------------------------------------66
Packing--------------------------------------------------------------------------------70
TC-610/620 PCB View----------------------------------------------------------------71
TC-610/620 Block Diagram---------------------------------------------------------74
TC-610/620 UHF ………………………………………………………………………………
TC-610/620 Level Diagram------------------------------------------------77
TC-610/620 Schematic Diagram--------------------------------------------------80
(U1) Schematic Diagram (AF & IF & PLL) …………………………………………………
(U1) Schematic Diagram (MCU & POWER)………………………………………….…………
(U1) Schematic Diagram (VCO & RF)………………………………………….…………
(U2) Schematic Diagram (AF & IF & PLL)…………………………………….……

2
(U2) Schematic Diagram (MCU & POWER)………………………………………….…………
(U2) Schematic Diagram (VCO & RF)………………………………………….……
Specifications-----------------------------------------------------------------------81

3
General
Manual Scope
This manual is intended for use by experienced technicians familiar with similar types of
communication equipment. It contains all service information required for the equipment and is
current as of the publication date.
Safety and General Information
The following general safety precautions as would normally apply, should be observed during all
phases of operation, service and repair of this equipment.
zThis equipment should be serviced by qualified technicians only.
zDO NOT operate the transmitter of radio unless all RF connectors are secure and any open
connectors are properly terminated.
zDo not modify the radio for any reason.
zUse only HYT original batteries and chargers.
zUse only the supplied or an approved antenna.
zDo not use any portable radio that has a damaged antenna. If a damaged antenna comes into
contact with your skin, a minor burn can result.
zFor vehicles with an air bag, do not place a radio in the area over an air bag or in the air bag
deployment area. Air bags inflate with great force. If a radio is placed in the air bag deployment
area and the air bag inflates, the radio may be propelled with great force and cause serious
injury to occupants of the vehicle.
zTurn off your radio prior to entering any area with a potentially explosive atmosphere.
zDo not charge your battery in a potentially explosive atmosphere.
zTo avoid possible interference with blasting operations, turn off your radio when you are near
electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way radio.” Obey
all signs and instructions.
zDo not expose the radio to direct sunlight over a long time, nor place it close to heating source.
zWhen using your radio, hold the radio in a vertical position with the microphone 3 to 4
centimeters away from your lips.
zIf you wear a radio on your body when transmitting, ensure that the radio and its antenna are at
least 2.5cm away from your body.

4
Radio Overview
TC-610
① PTT ② SK1 (programmable key) ③ SK2 (programmable key ④ Speaker
⑤ Microphone ⑥ Antenna ⑦ LED
⑧ Channel
Selector Knob
⑨ On-Off/Volume
Control Knob
⑩ Battery Latch
⑪ Earpiece Jack and
Programming Port
⑫ Earpiece Cover
⑬ Belt Clip ⑭ Battery ⑮ Belt Clip Screw ⑯ Charging Piece

5
TC-620
1
2
4
5
10
678 9
12
13
14
11
3
16
15
① PTT ② SK1 (programmable key) ③ SK2 (programmable key ④ Speaker
⑤ Microphone ⑥ Antenna ⑦ LED
⑧ Channel
Selector Knob
⑨ On-Off/Volume
Control Knob
⑩ Battery Latch
⑪ Earpiece Jack and
Programming Port
⑫ Earpiece Cover
⑬ Belt Clip ⑭ Battery ⑮ Belt Clip Screw ⑯ Charging Piece
PTT
Used to switch between transmitting and receiving modes. Hold down PTT and speak into the
microphone to transmit, while release it to receive.

6
SK1
Side key 1, programmable. Your dealer can program the key with a function via the programming
software.
SK2
Side key 2, programmable. Your dealer can program the key with a function via the programming
software.
LED
LED statuses and alert tones:
Power on the source
radio while holding down
the SK2 key.
Power on the slave
radio directly.
LED flashes orange once.
Source radio (After the
slave radio is powered
on and the cloning cable
is connected, press SK2
on the source radio to
start cloning)
When cloning, LED flashes red.
When completed, red LED goes out.
When failed, red LED goes out.
User
Wired
Clone
Slave radio
When cloning, LED flashes green.
When completed, green LED goes out.
Powering On in User Mode
The power-on alert tone sounds when the radio is
powered on.
When the current channel is idle, “BEEP” tone sounds
continuously.
Low Battery Power Alert
LED flashes red and a descending tone sounds every
ten seconds.

7
Transmit
LED glows red.
When transmission times out, “BEEP” tone sounds
continuously.
TOT pre-alert: “BEEP” tone sounds once.
Receive When a carrier is received, LED glows green.
Scan
When detecting, LED flashes green every second.
Scan start tone (programmable by your dealer): “BEEP”
tone sounds once.
Scan stop tone (programmable by your dealer): “BEEP”
tone sounds once.
Priority channel scan tone (programmable by your
deader): If the radio stays on a priority channel during
receiving, “BEEP” tone sounds once.
Programming
Reading: LED flashes red.
Writing: LED flashed green.
Power Adjust
When switching from high power to low power, a
descending tone sounds.
When switching from low power to high power, an
ascending tone sounds.
VOX
When enabling the VOX function, an ascending tone
sounds.
When disabling the VOX function, a descending tone
sounds.
Channel Selector Knob
Rotate the knob to select from channels 1 to 16.
On-Off/Volume Control Knob
Rotate the knob clockwise to turn the radio on, while rotate the knob fully counter-clockwise until a
“click” is heard to turn the radio off.

8
Turn the knob clockwise to increase the volume, or counter-clockwise to decrease the volume.
Software Specifications
Functions
1. Available Channels: 1 to 16 channels
Frequency Range:
UHF: 400-420MHz
UHF: 450-470MHz
2. Channel Spacing: 25KHz/12.5KHz
3. Channel Step: 5/6.25/10/12.5KHz channel scan function
4. Tx/Rx Indication (red/green LED)
5. CTCSS/CDCSS (38 groups of CTCSS and 83 groups of CDCSS with degrees of 180/120
available for CTCSS squelch tail reverse method)
6. Low Battery Power Alert
7. Auto Battery Save
8. Unlock Detect and Alarm
9. 9 Selectable Squelch Levels
10. Monitor
11. TOT
12. Squelch Tail Elimination
13. PC Programming (including PC manual adjustment and PC automatic adjustment)
14. High/Low Power Switch (2.0/5.0W)
15. Wide/Narrow Band Compatible
16. Busy Channel Lockout
17. Wired Clone
18. Battery Power Indication
19. Manual Adjustment
20. VOX and 5 Selectable Sensitivity Levels

9
Circuit Description
Realization Methods for Basic Functional Modules
PLL Frequency Synthesizer
The PLL circuit generates local oscillator signals for reception and RF carrier signals for
transmission.
The PLL circuit consists of the VCO oscillator circuit and baseband processor chip and realizes
frequency tracking and channel conversion under the control of MCU signals.
1. PLL
MB95F108AK
WPFV-GE1
U605
1/2
17bitDIV
32/33
OSC
1/2
21bitDIV
U202
CP
RX-VCO
L102
D103
L101
APC/TUNE
T/R-SW
CLK
DATA
EN
Q101
2SK508NV
D102
BUFFER
Q6
1
23
D104
D101
D100
Q100
2SK508NV
12.8MHZ
TX-VCO
LPF
Q5
1
23
Figure 2
The step frequency of the PLL circuit is 5.0KHz, 6.25KHz, 10.0KHz or 12.5KHz. Therefore, the
reference oscillator signal (38.4MHz) is divided into 5.0KHz, 6.25KHz, 10.0KHz or 12.5KHz
reference signals by a fixed counter in PLL of U202. Signals output by VCO pass through buffer
Q102 followed by amplifier Q103 and enters PLL of U200 for frequency division by a variable
divider. The signals from the frequency division are compared with reference signals in the phase
comparator PD of PLL. Signals output by the phase comparator is added to the varactors D100,
D101, D102 and D103 of VCO to control the output frequency after passing through a low pass
filter.
2. VCO
The VCO section is realized by the oscillator circuit of three-point capacitor.
In transmitting mode, the operation frequency of VCO is generated by Q100; in receiving mode, the
operation frequency of VCO is generated by Q101.

10
U202 generates a control voltage via the phase comparator to control varactors (D100 and D101 in
transmitting mode; D102 and D103 in receiving mode) to bring the oscillator frequency of VCO in
line with the preset frequency of MCU within a broader frequency range.
The switching tube Q652 switches between transmitting and receiving under the control of T/R. In
transmitting mode, T/R is set as low level and Q100 operates when Q653 becomes conductive. In
receiving mode, T/R is set as high level and Q101 operates when Q653 cuts off. Output from Q100
and Q101 is sent to the buffer amplifier for process after passing through amplifier Q102.
If PLL is unlocked, LD pin of U202 outputs low level. When this situation is detected by a
microprocessor, transmitting and receiving operations are suspended and an alert tone sounds.
RF Power Amplifying Circuit (Tx Section)
Block Diagram for RF Power Amplifying Circuit
R/TSW
L453
1u
RX
RQA0002
2
13
3 Amplifier
Q401
2SC4988
1
23
APC
LPF
2SK3475
2
13
Q400
2SC5108
1
23
Q104
2SC5108
1
23
MATCH
ANTENNA
Q402
0
RF PA
Q403
Figure 3
To obtain the required RF power, RF signals from VCO is amplified by driving amplifiers Q400 and
Q401 after passing through buffer Q104. The amplified RF signals enters driver Q402, which
performs power pre-amplification on the input signals to derive a certain power to drive the final
power amplifier. The final power amplifier Q403 performs power amplification again on the input RF
signals to derive the required power. Then the amplified RF signals pass through Tx-Rx switching
diode D401 followed by the LC low pass filter circuit (LPF). The signals are transmitted through the
antenna after ultraharmonics are filtered by the LPF.
Rx Amplification (LNA) and RF Bandpass Network (BPF)
To obtain better frequency selectivity, the Rx bandpass utilizes multiple electrically tunable circuits.
The block diagram is shown below:

11
C505
LNA
TUNE BPF
TUNE FROM MCU
C504
C523
L508 L506
Q500
D503
L507
D506
1
23
L501
C526
C519
C524
L502
C521
C506
TUNE FROM MCU
D504
D505
D507
TUNE BPF
Figure 4
The Rx signals input from the antenna is filtered to remove out-of-band signals at the electrically
tunable bandpass network (D503, D504, L501, L502, C503, C505 and 507) and then amplified by
low-noise amplifier (LNA) Q500 to obtain a certain level required by reception. The signals pass
through the three-level bandpass network (mainly consisting of D505, D506, D507 and periphery
components) to effectively restrain the out-of-band interference and to derive pure Rx RF signals,
which will be fed to the mixing stage.
The electrically tunable control signals are provide by MCU. The required level can be obtained
through table looking up or formula computing to accurately control varactors to operate within
proper voltage range. It constitutes a bandpass filter with the periphery inductive capacitors to track
the Rx frequency under the change of MCU control voltage and to obtain the preset Rx sensitivity
requirements and out-of-band interference requirements.
Mixing Circuit (MIXER) and IF Bandpass Network (BPF)
Block Diagram for the Mixing Circuit
L53022nH
C533
C534 C532
C531
XF1
Q501
38.85MHZ
1stIF BPF
RF MIXER
AN29160
C528
Figure 5
The mixer mainly processes the local oscillator signals and Rx RF signals output by VCO. The first
IF from the mixer is used by the demodulator chip to discriminate frequency. Here the active mixer

12
is utilized.
The mixer tube (Q501) utilizes dual gate FET MOS (3SK318) and has better noise characteristics
and square law characteristics. The isolation between the local oscillator signals and the Rx signals
is high. To ensure proper sensitivity and certain gain for the mixer tube, tune delicately via the
offset.
The signals output from the mixer pass through inductor L509 to remove residual spurious and then
enter the first IF filter. The filter utilizes the first-class crystal filter to ensure sufficient bandwidth and
excellent selectivity. The signals finally enter baseband processing chip AN29160 for demodulation.
APC/TUNE Automatic Power Control Circuit
Block Diagram for the Circuit:
R430
R421 Q431
DTA114YE
R437
C441
R422
R441
R433
R434
from MCU
V_BAT
TX_VCC
R432
R440
C435
C437
R438
C436
R442
C438
-+
+-
U430
NJM2904
1
3
4
2
5
7
8
6
R436
Q430
DTC114EE
2
31
R431
R420
R439
R500
C440C439
to RF PA(APC)
C434
R435
to BPF(TUNE)
Figure 6
Subject to the selected channel, MCU outputs the corresponding PWM waveform, which is
reshaped by the RC filter network (R441, R442, C440 and C441) to derive the APC/TUNE control
signal level. One part of them is used as the control voltage of the electrically tunable circuit after
passing through R500. In transmitting mode, the levels are voltage-divided by R439 and R440 to
obtain the APC reference voltage.
The transmitting current passes through R420, R421 and R422 to derive the error detect voltage.
The voltage is amplified by operational amplifier IC U430 and then compared with APC reference
voltage to output APC control voltage and to form closed-loop negative feedback power control
when the transmitting current changes.

13
Audio and Signalling Processing Circuit
Baseband processing IC AN29160 has high integration level and powerful functions. Many of the
processing functions (as VCO level detect&output, SQ signal level detect&output, Tx-Rx audio
processing switch, audio amplifier, etc) and can be realized inside. The Tx-Rx sharing can also be
realized.
Block Diagram for Tx Audio&Signalling Process
D104
Q100
2SK508NV
TX-VCO
cpu
Pre
Emphasis
SF
AMP(TX)
sp Amp
Tone
AFMOD
Mic amp
U200
AN29160AA
PROCESSER
信令输入
AF
HPF
5th-HPF
mic
MIC
AF
mute
volume
mic mute
LIM
(TX)
0
Figure 7
Tx Audio Process: Audio signals input from the MIC is converted to electrical signals through the
audioelectric conversion of MIC and the amplitude limit of them are amplified by U200 after the
signals are pre-emphasized. The processed signals go to the low-pass filter circuit to remove
frequencies above 3KHz and then go to VCO for direct frequency modulation after passing through
potentiometer VR200.
Tx Sinalling Process: MCU outputs, via the QTO port, signalling encoder waveform, which is
divided into two parts for modulation after passing through the RC network. One part is used to
modulate PLL reference-frequency oscillator directly, while the other part is used to modulate VCO.
VR260 balances the modulation and adjust the signal amplitude ratio of one part to the other, which
optimizes the singalling waveform modulated on the carrier.

14
Block Diagram for Rx Audio&Signalling Process
RX
sp Amp
2ndIF BPF
SF
AMP(TX)
VOX
Tone
tone-LPF
DET
BGR
EN
RSSI
Mic amp
VCO
DATA
0
5th-LPF
IFAMP2
AF
HPF
PE
信令输出
5th-HPF
IFAmp1
SW
To MCU
IC
CF300
450KHz+/4.5K
OUT IN
VREF
TX
De
Emphasis
LATCH
AF
mute
SPVCC
volume
To MCU
CDC/CTC
MCU
mix2
mic mute
POWERREG
VCC
LIM
(TX)
SQ
AUDIO OUT
16ΩIW
U201
AF
AMP
U200
AN29160AA
PROCESSER
Figure 8
U200 outputs initial audio signals (including noise, signaling, audio, etc) after performing
frequency-discrimination and demodulation on the received signals. Therefore, the audio process
is divided into three parts:
Rx Audio Process: One part of the audio signal output by U200 is fed to the RC low-pass filter and
de-emphasis circuit and then amplified by U200. The audio signal is recovered after frequencies
below 300Hz are removed. The recovered audio signal is adjusted by the potentiometer and then
goes to audio power amplifier IC (U201), which amplifies power for the input audio signals to drive
the speaker directly. To obtain higher power, the BTL bridge dual output is utilized.
Rx Signalling Process: One part of the audio signal output by U200 is fed to the 300Hz low-pass
filter circuit (U640). After audio signals above 300Hz are removed, CTCSS/CDCSS goes to the
QTIN pin of CPU. CPU decodes the input signallings.
Noise Signalling Process: One part of the audio signal output by U200 goes to U200 again. After
the signal is filtered, amplified and rectified inside U200, a DC voltage signal (SQ) corresponding to
the noise component is derived. The DC signal is fed to the BUSY pin of MCU via the ND pin of
U200. Then MCU processes the input signals.

15
MCU Control Section
The block diagram for the MCU control section is shown below. MCU works under the 7.3728MHz
clock frequency.
Channel SW
MB95F108AK
WPFV-GE1
U605
PTT
MON
BAT
A T 2 4 C 6 4
U609
APC/TUNE
PLL
1.vox
2.BUSY_DET
8.UART
7.W/N
6.DC/CTC
5.SAVE
4.T/R
3.BEEP/CALL
X601
9.BAT_DET
U610
Reset
IC
10.PLL_LD
7.3728M 晶体
Figure 9
The MCU control section is composed of MCU, EEPROM, RESET IC, keys, Channel Selector knob,
etc. Main functions realized by this circuit section are:
1. Control Signal:
Control of battery save mode
Control of high/low power switch
Control of band/narrow band switch
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

16
Detect of external PTT, MONI and VOX
Detect of PLL unlock (UL)
Detect of VOX ON level
Detect of battery power alarm
Detect of enabling and checking external remote speaker microphone
3. Data Transfer and Process
EEPROM data initiation
Programming data transfer
Encoding process of channel selector knob
Signalling encoding and decoding
Data transfer of baseband processing chip (PLL)
Power Supply Process
Block Diagram for the Circuit
SW
Q611
power management
Vin
VSS
Vout
---
7.2V
U606
L604
601s
SAVE
FMMT717FMMT717
Q612
5V
UPA572T
Q610
TXC
V-TX POWER-SAVE
Figure 10
After the radio is powered on, the battery voltage is provided to the RF power amplifier and audio
power amplifier to meet the requirements of sufficient power amplification after filtered by L604 and
C682. Another path is input with the regulator IC (U606) of 5V and outputs voltage of VCC_5V for
use by MCU and the baseband processing chip after regulated. Because the radio works under the
half duplex mode, it is required to control the Tx and Rx power supply alternately. To meet the
requirement of the battery save mode, MCU should output a pulse signal with fixed duty factor

17
(control signal of SAVE). When the SAVE signal of MCU is of high level, Q610 becomes conductive
and provides a 5V voltage (V_SAVE) for the operating circuit. PLL and the receiving circuit operate.
When the SAVE signal is a pulse signal, the radio enter the battery save mode. When transmitting,
TXC, control signal of CPU, is of high level. Q611 becomes conductive and provide a 5V voltage for
the transmitting circuit and the transmitting circuit operates.
Power supplies of the Tx section and Rx section both have symmetrical regulation measures.
When the load change changes the output voltage/current, the regulator closed-loop feedback
circuit operates, regulating the output voltage at 5V.
VOX Realization
The block diagram is shown below:
Q202
2SA1832
1
2 3
Q201
2SK1824
2
31
J4
MICJACK
2431
VCC_5V
R251
1M
MIC_EN
EXPTT
C260
220P
RXD
mic
X1
-
2
+
1
R201
2.2K
C201
470P
C200
4.7u/10V
R203
4.7K
VCC_5V
R200
470
C213
1U
C212
0.1U
R205
47K
C202
0.1U
L200 1UH
R202 100
TP200
R208
100K
R207
56K
R206 1K
R204 470
C274
0.01U
Figure 11
After the function key VOX is held down, the radio enters the VOX status. The VOX function can
only be enabled when MCU detect that MIC enabling signal (MIC_EN) and external VOX enabling
signal (EXT-PTT) switch from low level to high level almost at the same time (within hundreds of
milliseconds). Otherwise, it is detected as the earpiece without VOX and the VOX function is off.

18
When the remote speaker microphone with VOX is inserted into the earpiece jack, Q201 cuts off.
MIC_EN switches from low level to high level and Q202 completes the circuit with R204 and the
external remote speaker microphone simultaneously. Q202 becomes conductive. EXT-PTT
switches from low level to high level, which is detected by MCU as insert of a remote speaker
microphone with VOX. The VOX function is enabled. When the VOX detect level (5 levels available)
meets the preset requirements, the radio transmits and the audio signal goes to the baseband
processing IC AN29160 through the processing path.
If a remote speaker microphone without VOX (remote speaker microphone with PTT) is inserted,
Q201 cuts off. MIC_EN switches from low level to high level but Q202 can not complete the circuit
and keep the cut-off status. EXT-PTT is of low level. MCU detects as the remote speaker
microphone without VOX and the radio returns to the common mode. Press the PTT key on the
remote speaker microphone to transmit.
Semiconductor Data
Pin
No. Pin Name TC-610 TC-620 I/ ODescription
1 AVcc Vcc Vcc Power supply pin for A/D, connecting power
supply
2 AVR Vcc Vcc A/D reference input pin, connecting power
supply
3 PE3/INT13 PTT PTT I
PTT key (connected with pull-up resistor ) (valid
at low level)
4 PE2/INT12 A_KEY A_KEY I
SK1, programmable function key (connected
with pull-up resistor ) (valid at low level)
5 PE1/INT11 EXT-PTT EXT-PTT I
PTT key on the earpiece (connected with
pull-down resistor) (valid at high level)
6 PE0/INT10 B_KEY B_KEY I
SK2, programmable function key (connected
with pull-up resistor ) (valid at low level)
7 P83 ENC3 ENC3 I
8 P82 ENC2 ENC2 I
9 P81 ENC1 ENC1 I
10 P80 ENC0 ENC0 I
Encoder input of channel selector
knob(connected with pull-up resistor )
11 P71/TI0 T/R T/R O Tx-Rx switch control H(R)/L(T)
12 P70/TO0 Reserve Reserve O Reserved
13 MOD For down
-loading
For down
-loading I
An operating mode designation pin. When
downloading, this pin is connected with Vcc and
a resistor of 47K is also connected between the

19
pin and the grounded Vss. When not
downloading, only a resistor of 47K is connected
between the pin and the grounded Vss.
14 X0 OSC0 OSC0
15 X1 OSC1 OSC1
Connecting pin of 7.3728MHzMHz master
crystal oscillator
16 Vss GND GND Power supply (GND) pin (When recording, it is
connected with the GND recording port signals.)
17 Vcc VCC VCC MCU 5V power supply (When recording, it is
connected with the VCC recording port signals)
18 PG0 C C
This port can not be used as IO and a capacitor
is connected between the port and the grounded
Vss.
19 PG2/X1A OSC32K OSC32K
20 PG1/X0A OSC32K OSC32K Subsystem clock pin (Reserved）
21 /RST RESET RESET I
Reset (When recording, it is connected with the
RSTX recording port signals.)
22 P00/INT00 Reserve Reserve O
23 P01/INT01 Reserve Reserve O
24 P02/INT02 Reserve Reserve O
25 P03/INT03 Reserve Reserve O
Reserved
26 P04/INT04 PLLEN2 PLLEN2 I/
OPLL ENABLE
27 P05/INT05 PLLDATA
2
PLLDATA
2
I/
OPLL DATA
28 P06/INT06 PLLCLK2 PLLCLK2 I/
OPLL CLOCK
29 P07/INT07 UL2 UL2 I/
O
TB31202 PLL circuit unlock detect (H: Lock
L Unlock) (connected with pull-up resistor )
30 P10/UI0 RXD RXD I
UART RX (When recording, it is connected with
the UI recording port signals)
31 P11/UO0 TXD TXD O UART TX (When recording, it is connected with
the UO recording port signals)
32 P12/UCK0 Reserve Reserve O Reserved
33 P13/TRG0/A
DTG Reserve Reserve I Reserved
34 P14/PPG0 MIC_EN MIC_EN I
Check whether the MIC is connected(connected
with pull-down resistor) (valid at high level)
35 P20/PPG00 CTC_DCS CTC_DCS
P
W
M
CTCSS/CDCSS output
36 P21/PPG01 Reserve Reserve O Reserved
37 P22/TO00 TONE TONE O BEEP tone output/CALL tone output
38 P23/TO01 W/N W/N O Wide/Narrow band control W(L)/N(H)
39 P24/EC0 Reserve Reserve O Reserved

20
40 P50/SCL0 SCL SCL
S
C
L
EEPROM CLOCK
41 P51/SDA0 SDA SDA
S
D
A
EEPROM DATA
42 P52/PPG1 AP/TU AP/TU
P
W
M
Auto power control/adjust
43 P53/TRG1 TX_CTRL TX_CTRL O Tx power supply control “H”: valid
Transmission is on.
44 P60/PPG10 PLLCLK PLLCLK O PLL CLK
45 P61/PPG11 PLLDATA PLLDATA O PLL DATA
46 P62/TO10 PLLEN PLLEN O PLL ENABLE
47 P63/TO11 Reserve Reserve O Reserved
48 P64/EC1 Reserve Reserve O Reserved
49 P65/SCK Reserve Reserve O Reserved
50 P66/SOT Reserve Reserve O Reserved
51 P67/SIN Self Self I
For test (used to enter the factory clone mode,
connected with pull-up resistor)
52 P43/AN11 SPCNT SPCNT O Power supply control of main audio "H": audio O
N
53 P42/AN10 PCONT PCONT O Power supply control pin of AN29160AA
54 P41/AN09 RLED RLED O Red LED
55 P40/AN08 GLED GLED O Green LED
56 P37/AN07 Reserve Reserve O Reserved
57 P36/AN06 Reserve Reserve O Reserved
58 P35/AN05 TI TI
I/
A
D
CTCSS/CDCSS input
59 P34/AN04 BUSY BUSY
I/
A
D
Channel busy check (requiring 10-digit AD)
60 P33/AN03 BAT_DET BAT_DET
I/
A
D
Battery voltage detect (requiring 10-digit AD)
61 P32/AN02 Reserve Reserve O Reserved
62 P31/AN01 Reserve VOX
I/
A
D
VOX detect (requiring 10-digit AD)
63 P30/AN00 Reserve Reserve O Reserved
64 AVss GND GND Power supply (GND) pin for A/D, ground