5-5
5-6.
NICAM PR
OCESSOR PIN FUNCTION (NK-11 BO
ARD IC1)
Pin. No.
Pin
Name
1
OUT
L
2
OUT
R
3
VDD
A1
4
VSS
A1
5
VSS D1
6
VDD D1
7
VSS
D2
8
VDD D2
9
TP2
Additional test pin 2; connected to ground for normal operation
10
N.C.
–
Not used
1
1
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
T
uning voltage output for crystal oscillator
15
XT
AL
I
I
Crystal oscillator input
16
XT
AL
O
O
Crystal oscillator output
17
TEST2
I
T
est 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
T
est 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.
ZWEIT
ON PR
OCESSOR PIN FUNCTION (GK-12 BO
ARD 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
1
1
N.C.
–
Not used
12
N.C.
–
Not used
13
AFR
I
AF 1/2 signal return
14
LF1
–
Loop filter 1
15
XT
AL
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
–
T
rigger 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
4
1
V
R
E
F
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
5-5 E
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