5-6. NICAM PROCESSOR PIN FUNCTION (NK-11 BOARD IC1)
Pin. No. Pin Name I/O Function
1 OUT L O Analog signal output left
2 OUT R O Analog signal output right
3 VDD A1 – Analog power supply 5V; DAC circuitry
4 VSS A1 – Analog ground; DAC circuitry
5 VSS D1 – Digital ground; DAC circuitry
6 VDD D1 – Digital power supply 5V; DAC circuitry
7 VSS D2 – Digital ground; DSP part
8 VDD D2 – Digital power supply 5V; DSP part
9 TP2 I Additional test pin 2; connected to ground for normal operation
10 N.C. – Not used
11 TP1 I Additional test pin 1; connected to ground for normal operation
12 N.C. – Not used
13 N.C. – Not used
14 V TUNE O Tuning voltage output for crystal oscillator
15 XTAL I I Crystal oscillator input
16 XTAL O O Crystal oscillator output
17 TEST2 I Test pin 2; connected to ground for normal operation
18 I REF I Resistor for reference current generation; front end circuitry
19 N.C. – Not used
20 VSS A2 – Analog ground; analog front end circuitry
21 VDD A2 – Analog power supply 5V; analog front end circuitry
22 TEST1 I Test pin 1; connected to ground for normal operation
23 SIF2 I Sound IF input 2
24 V REF1 I Reference voltage; analog front end circuitry
25 SIF1 I Sound IF input 1
26 C RST Capacitor for power-on reset
27 VSS D3 – Digital ground; front end circuitry
28 VDD D3 – Digital power supply 5V; front end circuitry
29 SCL I Serial communication clock signal input
30 SDA I Serial communication data signal input
31 N.C. – Not used
32 N.C. – Not used
33 N.C. – Not used
34 N.C. – Not used
35 VDD D4 – Digital power supply 5V; demodulator circuitry
36 VSS D4 – Digital ground; demodulator circuitry
37 N.C. – Not used
38 N.C. – Not used
39 EXTI R I External audio input right channel
40 EXTI L I External audio input left channel
41 V REF2 I Analog reference voltage digital-to-analog converter and operational amplifiers
42 N.C. – Not used
43 VDD A3 – Analog power supply 5V; operational amplifiers
44 VSS A3 – Analog ground; operational amplifiers
5-7. ZWEITON PROCESSOR PIN FUNCTION (GK-12 BOARD IC001)
Pin. No. Pin Name I/O Function
1 OUT L O Audio left signal output
2 OUT R O Audio right signal output
3 CDE1 – De-emphasis 1 capacitor
4 N.C. – Not used
5 N.C. – Not used
6 CDE2 – De-emphasis 2 capacitor
7 A GND – Analog ground
8 AF1 I I Audio 1 signal input
9 N.C. – Not used
10 AF1 O O Audio 1 signal output
11 N.C. – Not used
12 N.C. – Not used
13 AFR I AF 1/2 signal return
14 LF1 – Loop filter 1
15 XTAL I 4MHz reference input
16 N.C. – Not used
17 N.C. – Not used
18 LF2 – Loop filter 2
19 N.C. – Not used
20 N.C. – Not used
21 MAD I Programmable address bit (module address)
22 N.C. – Not used
23 N.C. – Not used
24 CAF1 O AF1 capacitor
25 IF INT I IF intercarrier input
26 CAF2 O AF2 capacitor
27 D GND – Digital ground
28 VCC – Power supply 5V
29 SCL I Serial communication clock input
30 SDA I/O Serial communication data input and output
31 LPF – Pilot loop filter
32 AF2 O O Audio 2 signal output
33 AF2 I I Audio 2 signal input
34 CTR IG – Trigger capacitor
35 CID – Identification capacitor
36 N.C. – Not used
37 P1 O Output port 1
38 EXT M I External audio input monaural channel
39 EXTI R I External audio input right channel
40 EXTI L I External audio input left channel
41 V REF I Analog reference voltage digital-to-analog converter and operational amplifiers
42 P2 O Output port 2
43 OUT M O Audio monaural signal output
44 N.C. – Not used
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