Sanyo VPC-R1E Service Manual page 8

1-5. SY-A CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY-A block, refer to the block diagram. The SY-A 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. Strobe charge control.
Pin Signal
1~2 NOT USED
AVSS
3
AVR
4
5 AVCC
VDD3
6
7 UNREG (S)
VDD3
8
9 STROBO_V
10~12 P54~P56
13
VSS
DC_IN
14
15~16 X1, X0
17~18
MOD1, 0
19 P. ST.
20~23
S10~S13
24
P04
25~26 P05~P06
27 PLL_EN
28 USB_CNT
29 REQACK
30 SDIR
31 BAT_OFF
32 +3.2_SW
33 RESET B
34 P ON
35~36 NOT USED
37 VF_LED_G
38 EXT_IRQ1
39~40 SDATA
41 SCLK
42 SELF_LED_R
43
NOT USED
44~45 X0A, X1A
46 BUZZER
47
CHARGE
48~52 NOT USED
VCC
53
54~74 NOT USED
75~78 SO0~SO3
79~80 NOT USED
I/O
- -
GND
-
- Analog power
- Analog power
Main (ASIC system) power detection
I
I Battery power input (analog input)
Main (ASIC system) power detection
I
I Strobo charge voltage input (analog input)
I Connect to GND through register
-
GND
I
AC adaptor connection detection (analog input)
- Main clock oscillation terminal (4 MHz)
Connect to GND
I
I Reset input
I
Key matrix input
Connect to GND through register
I
Connect to GND through register
I
O ASIC PLL permission signal
USB connection detection
I
Serial communication control signal
I
Serial communication control signal
O
Battery OFF detection
I
3.2 V power (switch)
O
Reset output to ASIC
O
O DC/DC converter (analog) ON/OFF signal
- -
O VF LED (green) ON/OFF signal
O External interruption signal
Serial communication control signal
I/O
O Serial communication control signal
Self LED (red) ON/OFF signal
O
- -
- Sub clock oscillation terminal (32.768 kHz)
O
Buzzer output terminal
O Strobo charge ON/OFF signal
- -
Digital power
-
- -
Key matrix output
O
-
-
Table 4-1. 8-bit Microprocessor Port Specification
– 8 –
Outline
H : Connection
H : OFF
L : Reset
H : ON
L : Light
L : Light
L : ON