Specifications

RMU800A SERVICE MANUAL
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6. Audio processor: AK2346 (TX-RX Unit IC106)
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 circuit.
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.