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1
A
Pin No. Symbol
17
NC
18
PORT_DC
19
PORT_POWER
20
NC
21
VOL_LATCH
22
NC
23
NC
24
NC
B
25
NC
26
VOL_SCL
27
VOL_SDA
28
NC
29
NC
30
NC
31
NC
32
P32
33
P31
34
TUNER_RST
C
35
TUNER_SEN
36
TUNER_SCLK
37
TUNER_SDIO
38
TUNER_INT
39
NC
40
NC
41
PWR_LED
42
RX
43
TX
D
44
NC
45
24C16_SCLK
46
24C16_SDA
AV
47
REF
AV
48
SS
49
KEY1
50
KEY2
51
STEP
52
PORT_TEMP
E
53
FL_SW/RLY
54
ST/BY_LED
55
VOL_UP
56
VOL_DN
57
NC
58
NC
59
FLT_CE
60
FLT_CLK
61
FLT_DOUT
62
RMC
F
63
PWR_KEY
64
P_DN
24
1
2
I/O
-
NOT USED
I
DC Protection detection signal input pin
I
POWER Protection detection signal input pin
-
NOT USED
O
LATCH signal output for NJU7391
-
NOT USED
-
NOT USED
-
NOT USED
-
NOT USED
O
CLK signal output for NJU7391
I/O
Data signal output for NJU7391
-
NOT USED
-
NOT USED
-
NOT USED
-
NOT USED
O
SOFTWARE Debuffing Mode
O
SOFTWARE Debuffing Mode
O
Output to reset Tuner Pack
O
Output for Tuner Pack Serial Enable Input
O
Clock signal output for Tuner Pack
I/O
Data signal input & output for Tuner Pack
I
Tuner Interrupt signal input pin
-
NOT USED
-
NOT USED
O
Power LED control signal
I
UPGRADE Mode Pin
O
UPGRADE Mode Pin
-
NOT USED
O
Clock signal output for data backup of main CPU
I/O
Data signal input & output for data backup of main CPU
-
+3.3V power supply
-
Ground
I(A/D)
Data input for Key1 port
I(A/D)
Data input for Key2 port
I
TUNER STEP Mode Pin
I
Posistor Protection detection signal input pin
O
Output for chip switching of SC16315 and Output to ST-BY Relay ON/OFF
O
ST/BY LED control signal
I
Data input for VOLUME encoder
I
Data input for VOLUME encoder
-
NOT USED
-
NOT USED
O
Output for chip enable of SC16315
O
Output for chip CLK of SC16315
O
Output for chip DATA of SC16315
I
Remote control signal input pin
I
Data input for PWR_Key scan
I
power down signal input port
SX-20-K
2
3
Description
3
4
4
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