Nikon COOLPIX 4500 Maintenance Manual

VAA11901-R.3579.A

- E7 ･ E4500 -

50
51
52
53
54
55
56
57
58
59
60

61
62
63
64

FM CKI

FM OEB

BEEP

FM CW

TEST/AVREF ON

SB_POP

SB_DET

USB CONNECT

RXD

WAKE UP

SELF

FM RESETB

ASIC TEST

ASIC RESET

MAIN RESET

I

O
O
O
O
O

I
I
I

O
O

O
O
O
O

Focusing motor drive clock count
Focusing motor output enable signal
Buzzer output signal (4kHz)
Focusing motor drive direction signal
A/D standard voltage ON/OFF signal
Strobe up signal
Strobe up detection
USB cable connection detection signal
Host wake up input terminal 

L : OFF

SPARC wake up terminal
Red-eye reduction, self, AF assistance luminous drive
 

H : Lighting

Focusing motor drive phase reset signal
ASIC reset control signal
ASIC reset signal
SPARC reset signal

 

The SY1 circuit board carries out overall control of camera operation by detecting the input from the keyboard and 

the condition of the camera circuits. The 8-bit microprocessor reads the signals from each sensor element as input 

data and outputs this data to the camera circuits (ASIC) or to the LCD display device as operation mode setting data. 

Fig. 5-1 shows the internal communication between the 8-bit microprocessor, ASIC and SPARC lite circuits.

3. Key Operation
For details of the key operation, refer to the instruction manual.

SCAN IN

SCAN
 OUT

0

1

2

3

4

5

0
1
2
3

DOWN

ON/OFF

WIDE

MODE

UP

PLAY

CARD

SBM

LEFT

MONITOR

DIN CONNECT

BAT DET

RIGHT

M-FOCUS

AV JACK

SWIVEL

CENTER

QUAL

TELE

1st

-

FUNC

-

2nd

8-bit

Microprocessor

ASIC

32-bit

SPARC lite

S. REQ

DATA BUS

RESET

ASIC SO

ASIC SI

ASIC SCK

RESET