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5-15. IC PIN FUNCTION DESCRIPTION
• DISPLAY BOARD IC201 µPD78045FGF-082-3B9 (SYSTEM CONTROLLER, FL DRIVER)
Pin No. Pin Name I/O Description
1 to 7
DIG7 to DIG1 O Digit drive signal output to the fluorescent indicator tube (FL201)
8
VDD — Power supply terminal (+5V)
9 S.CLK
O
Serial data transfer clock signal output to the dolby surround pro-logic circuit (IC300, 301),
LC78212 (IC401) and PLL IC on FM/AM tuner pack “L” active
10 S.DATA
O
Serial data output to the dolby surround pro-logic circuit (IC300, 301), LC78212 (IC401) and
PLL IC on FM/AM tuner pack “L” active
11 PLL.DATA
I Serial data input from the PLL IC on FM/AM tuner pack “L” active
12
S.CE (LC7822) O
Serial chip enable signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack
“H” active
13 S.CE (LV1018)
O
Serial chip enable signal output to the dolby surround pro-logic circuit (IC300, 301)
“L” active
14
REAR-RLY O Speaker protect relay drive signal output for the rear side speaker “H”: relay on
15
BRIDGE-RLY O Bridgeable relay drive signal output terminal “H”: relay on
16 PROTECT
I Over load detect signal input from the protect circuit “L”: protect detect
17
RESET
I
System reset signal input from the reset signal generator (IC950, Q201) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
18 AUTO-STOP
I Tuned display detection signal input from the FM/AM tuner pack “L”: tuned
19 STEREO-IN
I Stereo detection signal input from the FM/AM tuner pack “L”: stereo
20 AVSS
— Ground terminal (for A/D converter analog system)
21 SP-RLY
O Speaker protect relay drive signal output for the front side speaker “H”: relay on
22 SURR-RLY
O Speaker protect relay drive signal output for the surround speaker “H”: relay on
23 POWER-RLY
O Relay drive signal output for the power on/off control “H”: relay on
24 SIGNAL
I FM and AM signal meter voltage detection signal input from the FM/AM tuner pack
25 A/D-4
I
Key input terminal (A/D input) S234 to S244 (SET UP, NAME, ENTER, +, –, EFFECT/
DELAY, CENTER, REAR, MODE +, SOUND FIELD ON/OFF, MODE –) keys input
26 A/D-3
I
27 A/D-2
I
28 A/D-1
I
Key input terminal (A/D input) S201 to S210 (DISPLAY, AM or RDS EON, 3, 2, 1, TUNING
–/+, PRESET TUNING –/+ or PRESET/PTY SELECT –/+, DIRECT) keys input
29
AVDD — Power supply terminal (+5V) (for A/D converter analog system)
30 AVREF I
Reference voltage (+5V) input terminal (for A/D converter)
31
RDS DATA IN I
RDS data input from the RDS decoder (IC1) (Used for the STR-DE335 AEP model only)
Except STR-DE335 AEP model: Not used (fixed at “L”)
32
OPEN — Not used (open)
33
GND — Ground terminal
34
X1 I Main system clock input terminal (4.19 MHz)
35
X2 O Main system clock output terminal (4.19 MHz)
36
WOOFER-RLY O Relay drive signal output for the woofer speaker “H”: relay on
37
LED SELECT O LED select signal output terminal “H” active
Key input terminal (A/D input) S222 to S226, S220, S221, S229 to S232 (BASS BOOST,
MUTING, SHIFT, 0, MEMORY, CD, MD/TAPE, TV/SAT or TV/LD, RDS PTY, 5.1CH/DVD)
keys input
(S220 CD key: used for the except STR-SE391)
(S221 CD key: used for the STR-SE391 only)
(S231 RDS PTY key: used for the STR-DE335 AEP model only)
Key input terminal (A/D input) S211 to S219, S227, S228, S245 (FM or FM/AM, 6, 5, 4, 7, 8,
9, FM MODE, VIDEO, TUNER, PHONO) keys input
(S227 TUNER key: used for the except STR-SE391)
(S228 TUNER key: used for the STR-SE391 only)
(S245 PNONO key: used for the STR-SE391 only)
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