Ic Pin Function Description - Sony XR-CA630X Service Manual

XR-CA630X
Ver 1.2

6-10. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN101C49KSC1 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF–
2 VSM
3 NIL
KEYIN1
4
KEYIN0
5
RCIN0
6
7, 8 NIL
9 DSTSEL
10 VREF+
VDD
11
OSCOUT
12
OSCIN
13
14 VSS
XI
15
XO
16
17 MMOD
18 LCDSO
LCDCE
19
LCDCKO
20
21 to 23 NCO
24 SYSRST
25 BUSON
26 KEYACK
27
NIL
28 BUIN
29 SIRCS
30, 31 NIL
32 VDD2
33 RESET
34
TUNON
35
BEEP
36 PW_ON
37
NCO
38 ACCIN
39
NCO
40 TELATT
41
VPP
42 BUSSO
26
I/O
I Reference voltage (0V) input terminal (for A/D converter)
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit (TU1)
I
(A/D input)
I Not used (fixed at "L")
Key input terminal (A/D input) LSW902, LSW905 to LSW909, LSW911, S902 to S905
(MENU, SOUND, ENTER, S SCROLL, PTY D DISPLAY, LIST, AF, > M SEEK+,
I
. m SEEK–, DISC/PRESET+, DISC/PRESET– keys input)
Key input terminal (A/D input) LSW901, LSW903, LSW904, LSW914 to LSW919, S906, S907
I
(OFF, SOURCE, MODE o, SHUF 6, 5, 4, 3 REP, 2, 1 keys input)
I Rotary remote commander key input terminal (A/D input)
I Not used (fixed at "L")
I Destination setting terminal Fixed at center voltage in this set
I Reference voltage (+5V) input terminal (for A/D converter)
—
Power supply terminal (+5V)
O Main system clock output terminal (18.432 MHz)
I Main system clock input terminal (18.432 MHz)
— Ground terminal
I
Sub system clock input terminal (32.768 kHz)
O
Sub system clock output terminal (32.768 kHz)
I
Selection signal of memory mode input terminal "L": single chip mode (fixed at "L")
O Serial data output to the liquid crystal display driver (IC900)
O Chip enable signal output to the liquid crystal display driver (IC900) "H" active
O Serial data transfer clock signal output to the liquid crystal display driver (IC900)
O Not used (open)
O Reset signal output to the SONY bus interface (IC581) "L": reset
O Bus on/off control signal output to the SONY bus interface (IC581) "L": bus on
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
I
and eject keys in the power off status On at input of "H"
I Not used (fixed at "L")
Battery detection signal input from the SONY bus interface (IC581)
I
"L" is input at low voltage
I SIRCS remote control signal input from the remote control receiver (IC971)
I Not used (fixed at "L")
—
Power supply terminal (+5V)
System reset signal input from the reset signal generator (IC551) and reset switch (S551)
I
"L": reset "L" is input for several 100 msec after power on, then it changes to "H"
O Tuner system power supply on/off control signal output "H": tuner power on
O Beep sound drive signal output to the power amplifier (IC751)
O Main system power supply on/off control signal output "H": power on
I Not used (open)
I Accessory detection signal input "L": accessory on
O Not used (open)
Telephone attenuate signal input At input of "H", the signal is attenuated by –20 dB
I
Not used (fixed at "L")
I Not used (fixed at "H")
O Serial data output to the SONY bus interface (IC581)
Description