Sony XR-F5100EE Service Manual page 25

• IC Pin Function Description
MAIN BOARD IC501 MN101C49KSS (SYSTEM CONTROLLER)
Pin No. Pin Name
VREF –
1
2 VSM
3 NIL
4, 5
KEYIN1, KEYIN0
6 RCIN0
QUALITY
7
8 NIL
9 DSTSEL
10 VREF
11 VDD
12 OSCOUT
13 OSCIN
14 VSS
15 XIN
16 XOUT
17 MMOD
18 LCDSO
19 LCDCE
20 LCDCKO
21 to 23 NCO
24 SYSRST
25 BUSON
26 KEY ACK
27 DAVN
28 BUIN
29 SIRCS
30 TUATTIN
31, 32 NIL
33 RESET
34 TUNON
35 BEEP
36, 37 NCO
38 ACCIN
39 NC (VCC)
40 TELATT
41 NC (VCC)
42 BUSSO
43 BUSSI
44 BUSCKO
45 I2C_SIO
46 NCO
47 I2C_CKO
48 AMPON
I/O
I Negative reference voltage (0V) input terminal
I FM and AM signal-meter voltage detection signal input from the tuner unit (A/D input)
I Not used
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 SEEK mode (A/D input)
I Not used
I Setting terminal for the destination
I Reference voltage (+5V) input terminal
— Power supply terminal (+5V)
O System clock output for high speed operation (18.43 MHz)
I System clock input for high speed operation (18.43 MHz)
— Ground terminal
I System clock input for high speed operation (32.768 kHz)
O System clock output for high speed operation (32.768 kHz)
I Setting terminal for the memory mode "L": single chip mode
O Serial data output to the LCD drive IC
O Chip enable signal output to the LCD drive IC
O Serial data transfer clock signal output to the LCD drive IC
O Not used
O System reset signal output to the SONY bus interface
O SONY bus on/off control signal output terminal "L": bus on
Acknowledge signal (wake up signal) input terminal for the key entry Acknowledge signal is
I
input to accept any function key in the standby status On at input of "H"
I Data transmit completed detection signal input from the RDS decoder Not used
I Back up power supply detection signal input terminal "L" is input at low voltage
I SIRCS signal input terminal
I Attenuate control signal input from the tuner pack
I Not used
System reset signal input from the reset signal generator and reset switch "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
O Power on/off control signal output for tuner section
O Beep sound drive signal output terminal
O Not used
I Accessory power detection signal input terminal "L": accessory power on
O Not used
Telephone muting detection signal input terminal
I
At input of "H", the audio signal is attenuated by 20 dB
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
I/O IIC two-way data bus with the tuner pack, electrical volume and power amplifier
O Not used
O I2C bus clock signal output to the tuner pack, electrical volume and power amplifier
O AMP muting on/off control signal output terminal
Description
XR-F5100EE
25