Pin No.
Pin Name
I/O
Description
Active
1~7
7G~1G
O
FL grid7~1.
8
VDD
-
Microprocessor power supply (+5V).
9
E2PROM SCL
I
E2PROM control clock.
10
E2PROM SDA
I/O
E2PROM control data.
11,12
NC
-
Unused.
13
A CLASS ON
O
POWER ON/OFF control signal.
H : ON
L : OFF
14
SEL STB
O
Strobe signal of selector IC.
15
SEL/PLL/CLK
O
Control clock of SEL/PLL IC.
16
SEL/PLL/DATA
O
Control data of SEL/PLL IC.
17
RESET
I
Reset signal of microprocessor.
L : Reset
18
CE
I
Detection signal input for AC OFF.
19
PLL DO
I
PLL IF count data.
20
AVss
-
A/D power supply(GND).
21
PLL CE
O
Chip enable control of PLL IC.
L : ON
22
T MUTE
O
Output terminal of muting signal for TUNER.
L : ON
23
STEREO
I
Stereo signal input for TUNER.
L : Stereo ON
24
SD
I
Synchronized signal detection input.
25
VOL SCL
O
Control clock of E. volume IC.
26
VOL DATA
O
Control data of E. volume IC.
L : CE
27
LEVEL IN
I
Volume level input.
H : ON
L : OFF
28
S LEVEL
I
Signal level input.(E/T type only)
29
A Vdd
-
A/D power 5V).
30
A VREF
-
A/D reference v5V).
31
CLOCK
-
32.768kHz oscillator.
32
CLOCK
-
32.768kHz oscillator.
33
Vss
-
Microprocessor power supply(GND).
34
MAIN COLCK
-
4.19MHz oscillator.
35
MAIN COLCK
-
4.19MHz oscillator.
36
S DATA
I/O
16 bit system data.
37
S BUSY
I/O
16 bit system busy.
H : BUSY
L : READY
38
H.P. MUTE
O
Muting signal input of headphones.
L : ON
39
ATT
O
Attenuator control.
L : ON
40
A MUTE
O
Audio muting signal control.
L : ON
41
LOW RELAY
O
Amplifier low relay control.
H : ON
L : OFF
42
HI RELAY
O
Amplifier high relay control.
H : ON
L : OFF
43
SP RELAY
O
Speaker relay control.
44,45
NC
I
Unused.
46
PROTECTION
I
Detection signal input of protection.
H : ON
L : OFF
47
REMOCON
I
Remote control input.
48
IC(VPP)GND
-
Connected to VSS.
49
CLASS A LED
O
Control signal output of class A LED.
L : ON
50
BIAS A MID
O
Bias control signal(MID) output.
51
BIAS B HI
O
Bias control signal(HI) of class A LED.
52
Vdd
-
Microprocessor power 5V).
53
ENC A
I
Volume encoder (A) input.
54
ENC B
I
Volume encoder (B) input.
55
HEAD PHONES
I
Detection signal input of headphones.
H : ON
L : OFF
56,57
-
O
Unused.
58~60
KR2~KR0
I
Key return input(KR2~KR0).
H : Key ON
61~64
P16~13/KS3~0
O
FL segment(6~13)/key scan(KS3~KS0).
H : ON
65~70
P12~P7
O
FL segment(12~7) control.
H : ON
71
VLOAD
-
FL driver power supply(-30V).
72~77
P6~P1
O
FL segment(6~1) control.
H : ON
78
NC
-
Unused.
79,80
9G,8G
O
FL grid(9G,8G) control.
6-2 Pin description
R-SG7/SG7G
6
CIRCUIT DESCRIPTION
R-SG7(K)
COVER1,1P(
99.10.30
0:17
PM
y [ W 11
