Nikon Coolpix 5700 Repair Manual page 39

1-4. SY-A CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY-A block, refer to the block diagram. The configuration of the SY-A block
centers around a 8-bit microprocessor (IC301).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Mode LCD display, 3. Clock control, 4. Power ON/OFF, 5. Storobe charge control, 6.
Signal output for lens control of zoom, focus and so on.
Pin Signal
1 RDY
2 TEMP
3 POP OUT
4~7 SCAN IN 6, 1~3
8 AVDD
9 AVREF
10 EVF_ON
11 EVF_BL
12
13 EL_ON
14 LCD ON
15 PWM
16 EXTSB DET
17 COMREQ
18 POP SW
19
20 ZRESET
21 BUZZER
22 CHG ON
23, 26 COM 0~3
27 BIAS
28, 30 VLC 0~2
31
32~55 S1~S24
56 DCINCHK
57 PICTL
58 LCD BL
59 SCAN IN5
60 SCAN OUT 0
51 ZPULSE 2
62~63 ZM IN2~1
64 WAKE UP
65 ADVREF ON
66
67 CMD IN1
68 BKUPCTL
69 SCAN IN0
70 PA ON
71 P ON
72 SELF LED
73 SP_MUTE
74 CARD
75
76
I/O
I
I
O
I
-
I
O
O
VSS -
O
O
O
I
I
I
NC -
I
O
O
O
-
-
VSS -
O
I
O
O
O
O
I
O
O
O
FSW O
I
O
I
O
O
O
O
I
SI I
SO O
A/D input (strobo charge voltage detection)
A/D input (lens temperature sensor)
Strobo pop up
Key matrix input
Analog power input terminal
Analog standard voltage input terminal
EVF circuit
EVF backlight
GND
Mode LCD backlight light
DC/DC converter (LCD system) ON/OFF signal
Dimmer D/A PWM output (14-bit PWM output)
External strobo connection detection terminal
Command request signal
Pop up detection
-
Zoom PI reset input
Beep output
Strobe charge control circuit (OSC)
LCD common output 0~3
LCD drive power supply (connect to VLC0 terminal)
LCD power input terminal (connect to outside resister connection)
GND
LCD segment output 1~24
Outside DC power detection
Photo interaptor ON/OFF control
LCD backlight ON/OFF
Key matrix input
Key matrix output
Zoom motor drive pulse count
Zoom motor drive pulse count 2~1
SPARC wake up terminal
AD VREF ON/OFF signal
F range change
Command dial input 1
Back up battery charge control
Key matrix input
DC/DC converter (analog) ON/OFF signal
DC/DC converter (digital) ON/OFF signal
Red-eye reduction, self, AF assistance luminous drive H : ON
Audio mute signal
Card detection (L=card)
Serial data input ( ← ASIC)
Serial data output ( → ASIC)
- E5 ･ E5700 -
VAA11801-R.3578.A
Outline
H : ON
H : ON
H : ON
H : ON
H : ON
L : Detection
L : Pop up
H : ON
L : DC jack
L : ON
H : ON
L : ON
L : Charge
H : ON
H : ON
H : ON
H : Card
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