Nikon coolpix L100 Repair Manual page 70

1-4. 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 micropro-
cessor (IC301), and controls camera system condition (mode). The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. backup and clock control in case of no battery, 3. Power ON/OFF control, 4. Storobe condensor charge
control, 5. Card, USB and AV jack detection, 6. LED lighting control.
Pin Signal
1 SCK
2 AV JACK
SCAN OUT0
3
4 SCAN OUT1
5 SCAN OUT2
6 BEEP
LCD PWM
7
8 CHGSEL
VDD2
9
10 VSS2
11
TON1
12 BACK_LED
13
PW_LED
14 NOT USED
15
USB_CNT
16
MENU
17 PW_ON
18 PLAY
19 UTX
20
SCAN IN0
WIDE1
21
22 TELE2
23 SCAN IN1
24 SCAN IN2
25
DC IN
26
SHUTTER 1st
27
P_ON
28 PLLEN
29 MAIN_RESET
30
NOT USED
31
P_ON2
32 STB_DDR
33 REFE_CTL
34
CHG_ON
35
VSS3
36
VDD3
37 (DBGP2)
38 (DBGP1/CLK)
39 (DBGP0/DATA0)
40 BC_MASK
41 SCAN IN3
CARD
42
43
SW3.2VON
I/O
O Serial clock output
I AV JACK insertion detection
O Keymatrix output
O Keymatrix output
O Keymatrix output
O Buzzer
LCD backlight brightness adjustment
O
Strobo charge electric current control
O
- Power 2
- GND 2
O
Image stabilization power control
O Back (strobo charge) LED lighting control
O Power LED lighting control
O -
I USB insertion detection
Menu key detection
I
POWER ON key detection (interrupt from HALT)
I
I PLAY key detection (interrupt from HALT)
Debugger UART sending
O
Keymatrix input
I
Wide key detection
I
Tele key detection
I
I Keymatrix input
I Keymatrix input
I DC jack detection
I Shutter 1st key detection
O Digital power control
O ASIC PLL circuit enable signal
System reset (MRST)
O
- -
O VDD 1.8 ASIC control signal
O VDD 1.8 DDR control signal
Self refresh information signal → ASIC
O
O Strobo charge control
GND 3
-
Power 3
-
-
System reservation terminal (CCD select terminal)
- System reservation terminal (CCD)
- System reservation terminal (CCD)
I ASIC directly
I Keymatrix input
I SD CARD insertion detection
Card pull-up power
O
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- E ･ L100 -
INC
VMA43007-R.3780.A
Outline