Ic Pin Function Description - Sony XR-CA370 Service Manual

XR-CA370/CA370X
• IC Block Diagrams
– MAIN Board –
IC200 SAA6588T/V2-518
20 18 17 16 15 14
19
POWER SUPPLY
& RESET
MULTI
PATH 57kHz
DETECTOR 8th ORDER
BAND-PASS FILTER
CLOCKED SIGNAL QUALITY
COMPARATOR DECODER
4 5
4
CLOCK
CLOCK
RDS/RDBS RDS/RDBS INTERFACE
DATA
DEMODULATOR DECODER REGISTER
DATA
OSCILLATOR
TEST IIC BUS SLAVE
CONTROL & CLOCK
TRANSCEIVER
1 2 3 4 5 6 7 8 9
IC400 BD3803F-FE2
22 21 20 19 18 17 16 15 14 13
2 VCO
1 C BUS
FADER FADER FADER
LOGIC
(0 ∼ –58, (0 ∼ –58, (0 ∼ –58,
∞ ∞ ∞
– dB) – dB) – dB)
TONE TONE
PASS PASS
BASS, TREBLE, MIDDLE
(–15dB ∼ +15dB, 1dB STEP)
VOLUME
∞
(+23 ∼ –79dB, – dB (+23 ∼ –79dB, –
1dB STEP)
INPUT GAIN
(0 ∼ 15dB, 1dB STEP) (0 ∼ 15dB, 1dB STEP)
MUTE
INPUT SELECTOR
(4 STEREO INCLUDE 1 ISOLATION INPUT)
VCC/2
1 2 3 4 5 6 7 8 9
IC800 MM1175XFF
BUS ON
1
OUT
13 12 11 RESET
RESET
2
SWITCH
OUT
PAUSE
BATT
DETECTOR BATT 3
SWITCH
CLK
4
OUT
VREF 5
DATA
6
IN/OUT
GND 7
10
12
FADER
(0 ∼ –58,
∞
– dB)
BASS, TREBLE, MIDDLE
(–15dB ∼ +15dB, 1dB STEP)
VOLUME
∞
dB
1dB STEP)
INPUT GAIN
MUTE
10 11

5-7. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC1 MN101C49KSF (SYSTEM CONTROLLER)
Pin No. Pin Name
1 VREF –
2
VSM
3 to 6 NC
VCC
14
7 QUALITY
RESET
13
IN
8 MPTH
BUS ON
9 NC
12
IN
10 VREF +
CLK
11
IN
11 VDD
BATT
10
CHECK 12 OSC2
13 OSC1
9 DATA IN
14 VSS
8 DATA OUT
15 XI
16 XO
17 MMOD
18 LCD-SO (TX)
19 LCD-SI (RX)
20 LCD-CKO
21 to 23 NC
24 SYS-RES
25 BUS-ON
26 KEYACK
27 DAVN
28 BU-IN
29 NC
30 TU-ATTIN
31, 32 NC
33 RESET
34 NC
35 BEEP
36 POWER-ON
37 ILL-IN
38 ACC-IN
39 NC
40 TEL-ATT
41 NCI
42 BUS-SO
43 BUS-SI
44 BUS-CKO
45 I2C-SIO
46 NC
47 I2C-CKO
48 AMP-ON
49 AMP-ATT
20 20
I/O Description
— Reference voltage (0V) terminal (for A/D converter)
I FM and AM signal meter voltage detection input from the tuner unit (A/D input)
I Not used
I Noise level detection signal input from the tuner unit (A/D input)
I Multi-path detection signal input from the RDS decoder (A/D input)
I Not used
— Reference voltage (+5V) 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 Setting terminal for the single chip mode "L": single chip (fixed at "L" in this set)
O
LCD serial data output to the liquid crystal display driver
I
LCD serial data input from the liquid crystal display driver
O LCD serial 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": uni-link on
I Key acknowledge signal detection input from the liquid crystal display driver
I RDS serial data request signal input terminal
Battery detection signal input from the bus interface and battery detect circuit
I
"L" is input at low voltage
I Not used
I
Tuner muting on/off control signal input from the tuner unit "L": muting on
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
Not used
O Beep sound drive signal output to the power amplifier "H": beep on
O Main system power supply on/off control signal output "H": power on
I Illuminate line detection signal input terminal "L": ill on Not used
Accessory detection signal input "L": accessory on
I
"H" is input for several 200 msec after accessory on, then it changes to "L"
O Not used
Telephone muting signal input terminal 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
I/O Two-way data bus with the tuner unit, RDS decoder and electrical volume
O Not used
O
Serial data transfer clock signal output to the tuner unit, RDS decoder and electrical volume
Standby on/off control signal output to the power amplifier
O
"L": standby mode, "H": amplifier on
O Muting on/off control signal output to the power amplifier "L": muting on