Semiconductor Data - HYT TM-628H Service Manual

Semiconductor Data

1. Positive voltage regulator: TA7805F (Power Unit IC602), TA7808S (Power Unit IC601)
2. EEPROM: CAT24C256WI 256K CATALYST (CPU Unit IC501)
Pin Function
Pin No.
1~3 A0~A2
4 GND
5 SDA
6 SCL
7 Write Protect
8 VCC
3. Audio processor: AK2346 (AFPwr Unit IC404)
Pin No.
1 AGNDIN
2 AGND
3 TXIN
4 TXINO
5 LIMLV
6 EXTLIMIN
7 MOD
8 VSS
9 TCLK
10 TDATA
11 DI/O
12 RDF/FC
13 SCLK
14 DIR
15 XOUT
16 XIN
17 VDD
18 EXPOUT
19 RXAFIN
20 RXAF
21 RXLPFO
22 RXINO
23 RXIN
24 TEST
Name I/O
I
I/O
I
Name I/O
I
O
I
O
I
I
O
O
I
I/O
O
I
I
I
I/O
O
I
O
O
O
I
I
TM-628H Service Manual
Address input
Ground
Serial data input/output
Serial clock input
Write protect
+5V
Analog ground input
Analog ground output
TX audio signal input
TXA1 feedback output
Limit level tuning
External signal input for pre-limiter
Modulated TX signal output
Ground
Clock output pin for MSK transmission data
MSK transmission data input
Data are latched synchronizing with the TCLK
rising edge.
Serial data input and output
Input for register setting data and output for
MSK receiving data
Rx flag, frame detection signal output pin
Clock input
Serial data input
Crystal oscillator input pin
Crystal oscillator input/output pin
Positive power supply pin
Signal output (after audio processing)
RX audio input pin
RX audio output pin
Rx LPF output pin
RXA1 feedback output pin
Demodulated signal input pin
Test register control input pin
18
Function
Function