Ic Pin Function Description - Sony STR-DE235 Service Manual

4-15. IC PIN FUNCTION DESCRIPTION

• DISPLAY BOARD IC201 µPD78045FGF-082-3B9 (SYSTEM CONTROLLER, FL DRIVER)
Pin No. Pin Name
1 to 7 DIG7 to DIG1
8
VDD
9 S.CLK
10 S.DATA
11 PLL.DATA
12
S.CE (LC7822)
13 S.CE (LV1018)
14 REAR-RLY
15
BRIDGE-RLY
16 PROTECT
17
RESET
18 AUTO-STOP
19 STEREO-IN
20 AVSS
21 SP-RLY
22 SURR-RLY
23 POWER-RLY
24 SIGNAL
25 A/D-4
26 A/D-3
27 A/D-2
28 A/D-1
29
AVDD
30 AVREF
31
RDS DATA IN
32 OPEN
33
GND
34
X1
35
X2
36 WOOFER-RLY
37
LED SELECT
38
PROLOGIC LED
39
C.STUDIO LED
40 HALL LED
41
ENTER LED
42 VOL DOWN
I/O
O Digit drive signal output to the fluorescent indicator tube (FL201)
— Power supply terminal (+5V)
Serial data transfer clock signal output to the dolby surround pro-logic circuit (IC300, 301),
O
LC78212 (IC401) and PLL IC on FM/AM tuner pack "L" active
Serial data output to the dolby surround pro-logic circuit (IC300, 301), LC78212 (IC401) and
O
PLL IC on FM/AM tuner pack "L" active
I Serial data input from the PLL IC on FM/AM tuner pack "L" active
Serial chip enable signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack
O
"H" active
Serial chip enable signal output to the dolby surround pro-logic circuit (IC300, 301)
O
"L" active
Speaker protect relay drive signal output for the rear side speaker "H": relay on
O
Not used (open)
O Bridgeable relay drive signal output terminal "H": relay on
I Over load detect signal input from the protect circuit "L": protect detect
System reset signal input from the reset signal generator (IC950, Q201) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I Tuned display detection signal input from the FM/AM tuner pack "L": tuned
I Stereo detection signal input from the FM/AM tuner pack "L": stereo
— Ground terminal (for A/D converter analog system)
O Speaker protect relay drive signal output for the front side speaker "H": relay on
O Speaker protect relay drive signal output for the surround speaker "H": relay on
O Relay drive signal output for the power on/off control "H": relay on
I FM and AM signal meter voltage detection signal input from the FM/AM tuner pack
Key input terminal (A/D input) S234 to S244 (SET UP, NAME, ENTER, +, –, EFFECT/
I
DELAY, CENTER, REAR, MODE +, SOUND FIELD ON/OFF, MODE –) keys input
Key input terminal (A/D input) S222 to S226, S220, S229 to S231 (BASS BOOST, MUTING,
I
SHIFT, 0, MEMORY, CD, MD/TAPE, TV/LD, RDS PTY) keys input
Key input terminal (A/D input) S211 to S219, S227 (FM/AM, 6, 5, 4, 7, 8, 9, FM MODE,
I
VIDEO, TUNER) keys input
Key input terminal (A/D input) S201 to S210 (DISPLAY, RDS EON, 3, 2, 1, TUNING –/+,
I
PRESET/PTY SELECT –/+, DIRECT) keys input
— Power supply terminal (+5V) (for A/D converter analog system)
I
Reference voltage (+5V) input terminal (for A/D converter)
I RDS data input from the RDS decoder (IC1)
— Not used (open)
— Ground terminal
I Main system clock input terminal (4.19 MHz)
O Main system clock output terminal (4.19 MHz)
O Relay drive signal output for the woofer speaker "H": relay on Not used (open)
O LED select signal output terminal "H" active
O LED drive signal output terminal "H": LED on Not used (open)
O LED drive signal output of the CINEMA (D231) indicator "H": LED on
O LED drive signal output of the MUSIC (D232) indicator "H": LED on
I Not used (fixed at "L")
Motor drive signal (volume down direction) output to the volume motor drive (IC202)
O
"H" active
Description
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