− 8 −
Pin
Signal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
38
42~44
45~47
48~61
34~37
39~41
62~64
SCAN OUT3
LCD ON 2
P(A) ON
P ON
CHG ON
ASIC TEST
MAIN RESET
ASIC RESET
STBY (R) LED
STBY (G) LED
SELF LED
LCD ON 1
AD ON
RXD
SCK
SO
SI
S. REQ
DIN CONNECT
BAT OFF
RESET
XIN
XOUT
VSS
VDD
XCOUT
XCIN
AVSS
VREF
BATTERY
CHG VOL
AV JACK
CARD
SCAN IN 0~3
VLC3
NOT USED
COM3~COM1
NOT USED
S14~S1
SCAN OUT 0~2
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
O
O
I
I
I
I
I
I
O
-
-
O
I
I
I
I
I
I
I
I
I
O
O
O
O
O
Outline
Key matrix output 3
LCD monitor ON/OFF signal (2)
L : ON
DC/DC converter (analog) ON/OFF signal
L : ON
DC/DC converter (digital) ON/OFF signal
L : ON
Flash charge ON/OFF signal
L : ON
ASIC reset control signal
SPARC reset signal
L : Reset output
ASIC reset signal
L : Reset output
Standby LED (red) ON/OFF signal
L : LED light
Standby LED (green) ON/OFF signal
L : LED light
Self-timer LED ON/OFF signal
L : LED light
LCD monitor ON/OFF signal (1)
L : ON
AD converter power ON/OFF signal
L : ON
RS-232C RXD input terminal
Serial clock output (
→
ASIC)
Serial data output (
→
ASIC)
Serial data input (
←
ASIC)
Serial communication request singnal
L : Serial request
DIN jack connection detection signal
H : Connection
Reset input
Main clock oscillation terminal (1 MHz)
Main clock oscillation terminal
GND
VDD
Clock oscillation terminal (32.768 kHz)
Clock oscillation terminal
Analog GND input terminal
Analog reference voltage input terminal
Battery voltage input (AD input)
Strobe charge voltage input (AD input)
AV output cable connection detection signal
L : Connection
Memory card attachment detection signal
L : Attachment
Key matrix input 0~3
Mode LCD power input terminal
-
LCD common output
-
Mode LCD segment output
Key matrix output 0~2
Table 4-1. 4-bit Microprocessor Port Specification
Battery OFF detection signal
L : OFF
1-5. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit board, refer to the block diagram. The configuration of the SY1 circuit board
centers around a 4-bit microprocessor (IC301).
The 4-bit microprocessor handles the following functions.
1. Operation key input, 2. Mode LCD display, 3. Clock control, 4. Power ON/OFF, 5. Storobe charge control
