Sanyo VPC-E7 Service Manual page 9

1-5. SYA CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SYA block, 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 and backup, 3. Power ON/OFF, 4. Storobe charge control, 5. Signal input and output for
zoom and lens control.
Pin Signal
BAT_OFF
1
2 SW3.2ON
PLLEN
3
4
WON
5 NOT USED
6
RESET
XCOUT
7
8 XCIN
9 IC (FLMD0)
10 XOUT
11
XIN
12 REGC
13 VSS
14 EVSS
15
VDD
16 EVDD
17 MAIN_RESET
NOT USED
18
19
NOT USED
20 SELF_LED
21 NOT USED
22 USB_CONNECT
23 POWER KEY
24 S2
25 SCAN IN 4
26 SCAN IN 3
27 SCAN IN 2
28 SCAN IN 1
29 SCAN IN 0
30 P ON
31 COMREQ
32
NOT USED
33 BACKUP CTL
34 SCAN OUT 0
35
SCAN OUT 1
36 SCAN OUT 2
NAND RESET
37
38 SREQ
39 TSEN_PULSE
40 LCD PWM
41 BL ON
I/O
Battery OFF detection signal input
I
SW 3.2 V system ON/OFF signal
O
O System ASIC PLL circuit enable signal
-
O
O -
I Microprocessor reset input
O Clock oscillation terminal for clock (32.768 kHz)
Clock oscillation terminal for clock (32.768 kHz)
I
-
Program writing control signal, mode lead-in
I 8-bit microprocessor clock input when writing (EXCLK)
O
-
- Regulator output for internal operation
- GND
- GND
- Power terminal
Power terminal
-
O System reset (MRST)
-
O
-
O
Self-timer LED (L= lighting)
O
-
O
USB enable insertion detection (L= insertion)
I
Power key input
I
I Shutter S2 input
I Keymatrix input
I Keymatrix input
I Keymatrix input
I Keymatrix input
Keymatrix input
I
I D/D converter (digital system) ON/OFF signal
Command request input (combined with BOOT output)
I/O
O -
O Backup battery charge control (L= charge)
O Keymatrix output
O Keymatrix output
O Keymatrix output
O One NAND memory reset (L= RESET)
I Serial communication request signal
Clock output for touch sensor (approx. 30 kHz)
O
LCD backlight dimmer control signal
O
O LCD backlight ON/OFF signal
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