6-8. Ic Pin Function Description - Sony XR-CA440H Service Manual

6-8. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC501 MN101C49GYA2 (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF–
2 VSM
3 NIL
KEYIN1
4
KEYIN0
5
RCIN0
6
7, 8 NIL
DSTSEL
9
10 VREF+
VDD
11
12 OSCOUT
OSCIN
13
VSS
14
XIN
15
16 XOUT
17 MMOD
LCDSO
18
LCDCE
19
LCDCKO
20
21 to 23 NCO
24 SYSRST
25 BUSON
26 KEYACK
27 NIL
28 BUIN
29
SIRCS
30, 31 NIL
32 NIH
33 RESET
34
TUNON
35
BEEP
36 PW_ON
37
FM_ON
38 ACCIN
39
NCO
40
TELATT
41
NIH
42 BUSSO
43 BUSSI
44 BUSCKO
I/O
I
Reference voltage (0V) input terminal (for A/D converter)
FM and AM signal meter voltage detection signal input from the tuner unit
I
(A/D input)
I Not used
I Key input terminal (A/D input)
I Key input terminal (A/D input)
I Rotary remote commander key input terminal (A/D input)
I Not used
I
Destination setting terminal (A/D input)
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 "L": single chip mode
I
(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
Reset signal output to the SONY bus interface "L": reset
O Bus on/off 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 Not used
Battery detection signal input from the SONY bus interface
I
"L" is input at low voltage
I
SIRCS remote control signal input terminal Not used
I Not used
I Not used
System reset signal input from the reset signal generator and reset switch "L": reset
I
"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
O Main system power supply on/off control signal output "H": power on
O FM power supply on/off control signal output "H": FM power on
I Accessory detection signal input "L": accessory on
O Not used
Telephone attenuate signal input At input of "H", the signal is attenuated by –20 dB
I
Not used
I Not used
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
Description
XR-CA440H
21