Sanyo VPC-E10 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 configuration of the SYA block centers around a 8-
bit microprocessor (IC301).
The 8-bit microprocessor handles the following functions.
1. Operation key input, 2. Clock control, 3. Power ON/OFF, 4. Storobe charge control
Signal
Pin
1 SCK
BACKUPCTL
2
NAND RESET
3
4
BAT_T_V
5 NOT USED
6 TSEN_PULSE
NOT USED
7
LCD_PWM
8
9 VDD
10
VSS
11
SELF_LED
12 CARD ON
13
NOT USED
14 MRST
15
NOT USED
16 NOT USED
17 NOT USED
18 PLLEN
19 UTX
20 USB_CONNECT
SCAN IN0
21
22 SCAN IN1
23 SCAN IN2
SCAN IN3
24
25
NOT USED
26 KEY_2nd
27
P ON
28 BL ON
NOT USED
29
30 NOT USED
31 NOT USED
32 NOT USED
33 NOT USED
34 NOT USED
35 VSS3
36 VDD3
RDSEL
37
38 CLK
39 DATA0
CHG
40
41 SCAN OUT3
42
SCAN OUT2
43 SCAN OUT1
I/O
O Serial clock output
Backup battery charge control (L= charge)
O
O OneNAND flash memory reset
O T terminal power
-
-
O Touch sensor pulse output
-
-
LCD PWM
O
I Power
-
GND
O
Self timer LED (L= lighting)
O Card detection pull-up output
- -
O System reset
-
-
-
-
- -
PLL oscillation control signal
O
UART sending (for debugger)
O
USB power detection terminal (L= detection, using built-in pull-up)
I
Keymatrix input (using built-in pull-up)
I
Keymatrix input (using built-in pull-up)
I
I Keymatrix input (using built-in pull-up)
Keymatrix input (using built-in pull-up)
I
- -
2nd switch (using built-in pull-up)
I
Digital system power on control
O
O LCD backlight power on signal
- -
- -
- -
- -
-
-
-
-
- GND
I
Power
Microprocessor rewrite port
I
Microprocessor rewrite port
I
I Microprocessor rewrite port
O Strobo charge control (H= charge)
O Keymatrix output
O Keymatrix output
O
Keymatrix output
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