Ic Pin Function Description - Sony XR-CA665EE Service Manual

6-10. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN101C49KSY (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF–
2 VSM
3 NIL
KEYIN1
4
5 KEYIN0
RC_IN0
6
QUALITY
7
8 NIL
9 DSTSEL
10 VREF+
VDD
11
OSC2
12
13 OSC1
VSS
14
XI
15
XO
16
17 MMOD
LCDSO
18
LCDCE
19
LCDCKO
20
21 to 23 NCO
24 SYSRST
25 BUSON
26 KEYACK
27 DAVN
28 BU_IN
29
SIRCS
30
TUATT IN
31 NIL
32 NIH
33 RESET
34
TUNON
35
BEEP
36, 37 NCO
38 ACCIN
39
NCO
40
TELATT
41 NIH
42 BUSSO
43 BUSSI
44 BUSCKO
45 I2CSIO
I/O
I Reference voltage (0V) input terminal (for A/D converter)
I FM and AM signal meter voltage detection signal input from the tuner unit (A/D input)
I Connected to the ground
I Front panel key input terminal (A/D input)
I Front panel key input terminal (A/D input)
I Rotary remote commander key input terminal (A/D input)
I Noise level detection signal input at the SEEK mode (A/D input) Not used
I Connected to the ground
I Destination setting terminal
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)
Selection signal of memory mode input terminal
I
"L": single chip mode (fixed at "L" in this set)
O Serial data output to the liquid crystal display driver
O Chip enable signal output to the liquid crystal display driver "H" active
O Serial data transfer clock signal output to the liquid crystal display driver
O Not used
O
System reset signal output to the SONY bus interface "L": reset
O Bus interface control signal output to the SONY bus interface "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 Sync detection signal of RDS data block input terminal "H" active Not used
I Battery detection signal input from the SONY bus interface "L" is input at low voltage
I
SIRCS remote control signal input from the remote control receiver
I
Tuner muting on/off control signal input from the tuner unit "L": muting on
I Connected to the ground
I
Connected to the power supply (+5V)
System reset signal input from the reset signal generator and reset switch "L": reset
I
For several hundreds sec. after the power supply rises, "L" is input, then it changes to "H"
O Tuner system power supply on/off control signal output terminal "H": tuner power on
O Beep sound drive signal output to the power amplifier
O Not used
I Accessory detection signal input terminal "L": accessory on
O Not used
I Telephone attenuate signal input terminal At input of "H", the signal is attenuated by –20 dB
I Connected to the power supply (+5V)
O Serial data output to the SONY bus interface
I Serial data input from the SONY bus interface
O Serial data transfer clock signal output to the SONY bus interface
I/O Two-way data bus with the tuner unit and electrical volume
Description
XR-CA665EE
23