5-8. Ic Pin Function Description - Sony STR-DE135 Service Manual

5-8. IC PIN FUNCTION DESCRIPTION

• DISPLAY BOARD IC201 µPD78044FGF-115-3B9 (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 (LV1010)
14 REAR-RY
15
BRIDGE
16 PROTECT
17
RESET
18 AUTO-STOP
19 STEREO-IN
20 AVSS
21 SP-RY
22 SURR-RY
23 POWER-RY
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 WOFER RLY
37
LED SELECT
38
DOLBY LED
39
C STUDIO LED
40 HALL LED
41
ENTER LED
42
VOL DOWN
43 VOL UP
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 LC78212 (IC401), PLL IC on FM/AM tuner pack
O
"L" active
O Serial data output to the LC78212 (IC401), 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
O Serial chip enable signal output terminal
O Relay drive signal output for the rear side speaker "H": relay on Not used (open)
O Bridgeable relay drive signal output terminal "H": relay on Not used (open)
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 Relay drive signal output for the speaker protect "H": relay on
O Relay drive signal output for the surround speaker "H": relay on Not used (pull down)
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) S210 (NAME) key input
I
(Used for the AEP and UK models only)
Key input terminal (A/D input) S231 to S239 (BASS BOOST, MUTING, SHIFT, 0, MEMORY
I or MEMORY/ENTER, CD, MD/TAPE, TV/SAT or TV/LD, RDS PTY) keys input
(S239 RDS PTY key: used for the AEP and UK models only)
Key input terminal (A/D input) S221 to S230 (FM or FM/AM, 6, 5, 4, 7, 8, 9, FM MODE,
I
VIDEO, TUNER) keys input
Key input terminal (A/D input) S211 to S220 (DISPLAY, AM or RDS EON, 3, 2, 1, TUNING
I or TUNING/CHAR –/+, PRESET TUNING or PRESET/PTY SELECT –/+, DIRECT) keys input
(S211 DISPLAY key: used for the AEP and UK models only)
— 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) (Used for the AEP and UK models only)
— 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 Not used (open)
O LED drive signal output terminal "H": LED on Not used (open)
O LED drive signal output terminal "H": LED on Not used (open)
O LED drive signal output terminal "H": LED on Not used (open)
I Not used (fixed at "L")
Motor drive signal (volume down direction) output to the volume motor drive (IC202)
O
"H" active
Motor drive signal (volume up direction) output to the volume motor drive (IC202)
O
"H" active
Description
"L" active Not used (pull down)
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