Read Sony NAS-SV20DI / NAS-SV20I Service Manual online
NAS-SV20Di/SV20i
32
• IC Pin Function Description
MAIN BOARD IC103
μPD78F0501AMC (S)-CAB-E2-AX (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
D_RESET
O
Reset signal output to the digital power amplifi er
2, 3
NO USE
-
Not used
4
SIRCS
I
SIRCS signal input terminal
5
AC_DETECT
I
Power failure detection input terminal
6
XRESET
I
System reset signal input terminal
7
FLMD0
I
Not used Fixed at “L” in this set
8
X2
O
System clock output terminal (4.19 MHz)
9
X1
I
System clock input terminal (4.19 MHz)
10
REGC
-
Not used
11
VSS
-
Ground terminal
12
VDD
-
Power supply terminal (+3.3V)
13
NO USE
I
Not used
14
POWER_ON
O
Power supply on/off control signal output terminal
15
D_ERROR
I
Protect detection signal input from the digital power amplifi er
16
SIRCS
I
SIRCS interrupt signal input terminal
17
POWER_SW
I
Power key signal input terminal
18
RED_LED
O
LED (red) drive signal output terminal “L”: LED (red) on
19
GREEN_LED
O
LED (green) drive signal output terminal “L”: LED (green) on
20
VDD_HP
I
Power supply voltage detection signal input terminal for the VDD_HP
21
NO_USE
I
Not used
22
RXD
I
Serial data input terminal for the software writing UART
23
TXD
O
Serial data output terminal for the software writing UART
24
5V_OFF
O
Power supply on/off control signal output terminal for the DC/DC converter
“H”: DC/DC converter off
“H”: DC/DC converter off
25
SI
-
Not used
26
XSCK
-
Not used
27
AVREF
I
Reference voltage input terminal the A/D converter (+3.3V)
28
AVSS
-
Ground terminal for the A/D converter
29
MUTE
O
Audio muting on/off signal output terminal
30
SPEC_IN
I
Destination setting terminal
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