Nikon COOLPIX 2200 Repair Manual page 48

1-3. SYA CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SYA block diagram, refer to the block diagram. The SYA block centers around a
8-bit microprocessor (IC301), and controls camera system condition (mode).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Clock control, 3. Power ON/OFF, 4. Storobe charge control, 5. Signal input and output for
zoom and lens control.
Pin Signal
1 AVREF
2 AVSS
3 IC (FLMD0)
4 VDD
5 REGC
6 VSS
7 XIN
8 XOUT
9 RESET
10 XCIN
11 XCOUT
12 CLKSEL0
13 BAT_OFF
14 LCD ON 3
15 USB CONNECT
16 ZPULSE1
17 SREQ
18 BACKUP_CTL
19 BEEP
20 FLMD1
21 LCD ON2
22 LCD ON
23 PTCTL
24 BL_ON
25 PRG SO
26 PRG SI
27 PRG SCK
28 MAIN RESET
29 PW_LED
30 SB. LED (R)
31 AF. LED (G)
32 VSS
33 VDD
34 P ON
35 PA ON
36 SCK
37 SI
38 SO
39 CHG ON
40 FLMD0_SY
41~44 SCAN OUT 3~0
45 SCAN OUT 4
I/O
I Analog standard voltage input terminal
- GND
- Power for program writing
- VDD
- Regulator output stability capacity connection
- GND
- Main clock oscillation terminal (4MHz)
O Main clock oscillation terminal
I Reset input
I Clock oscillation terminal (32.768 kHz)
O Clock oscillation terminal
O PLL oscillation ON/OFF
I Battery off detection signal input
O D/D converter (LCD system) ON/OFF signal
I USB power detection terminal
I Zoom motor drive pulse count (interruption)
I Serial communication requirement signal
O Backup battery charge control (L= charge)
O Buzzer
- Power for program writing
O D/D converter (LCD system) ON/OFF signal
O D/D converter (LCD system) ON/OFF signal
O Photo interruptor ON/OFF control
O Backlight ON/OFF
O Flash for serial data input
I Flash for serial data input
O Flash for serial clock output
O System reset (MRST)
O Self-timer LED (L = Lighting)
O SB LED (red)
O VF LED (green)
- GND
- VDD
O D/D converter (digital system) ON/OFF signal
O D/D converter (analog system) ON/OFF signal
O Serial clock output
I Serial data input
O Serial data output
O Strobe charge control
- FLMD0 pull-up power when self programming
O Key matrix output
O LED3 (H = Lighting)
- E5 ･ E2200 -
VAA23001-R.3626.A
Outline
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