HYT TM-800K, Руководство по обслуживанию

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TM-800K Service Manual
23
6-1 Pin Function
Pin No. Name I/O Function
1 AGNDIN I Analog ground input pin.
2 AGND O Analog ground output pin.
3 TXIN I Transmit audio signal input pin.
4 TXINO O TXA1 feedback output pin.
5 LIMLV I Limit level adjuster pin.
6 EXTLIMIN I External signal input pin pre-limiter pin.
7 MOD O The modulated transmit signal output pin.
8 VSS GND.
9 TCLK O Clock output pin for MSK transmission data.
10 TDATA I
MSK transmission data input pin.
Data are latched synchronizing with the TCLK rising edge.
11 DI/O I/O
Serial data input and output pin.
Input for register setting data and output for MSK receive data.
12 RDF/FC O MSK signal received flag and frame detection signal output pin.
13 SCLK I Clock input pin for serial data I/O.
14 DIR I Serial data I/O control pin.
15 XOUT I Crystal oscillator connecting input pin.
16 XIN I/O Crystal oscillator connecting input and output pin.
17 VDD Positive power supply pin.
18 EXPOUT O Expander and VR4 output pin.
19 RXAFIN I Receive audio signal input pin.
20 RXAF O Receive audio signal output pin.
21 RXLPFO O Receive LPF output pin.
22 RXINO O RXA1 feedback output pin.
23 RXIN I Demodulated audio signal input pin.
24 TEST I Test register control input pin.
7. D/A converter with buffer amplifier: M62364FP (TX-RX Unit IC125)
7-1 Pin Function
Pin No. Name I/O Description
1,4,9,12,13,16,21,24 V
IN1
-V
IN8
I D/A converter input.
2,3,10,11,14,15,22,23 V
OUT1
-V
OUT8
O D/A converter output with 8-bit resolution.
5 V
DD
+5V.
6 LD I A low state enables data loading to shift register.
7 CLK I Shift clock input.
8 DI I Serial data input.
17 DO O Serial data output.
18 V
DAref
I D/A Converter reference voltage input.
19 RESET I Reset 8-bit latches.
20 GND GND.