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1-6. 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 8-bit microprocessor (IC301).
The 8-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
Signal
Pin
1
CHG VOL
SCAN IN
2~7
8
AVDD
9
VREF
STBY (R) LED
10
11
STBY (G) LED
12
VSS
SELF LED
13
14~19
NOT USED
20
AVREF ON
21
BUZZER
22
CHG ON
23~30
NOT USED
31
VSS
32~69
NOT USED
70
P (A) ON
71
P ON
72
DIN CONNECT
73
CARD
74
AV JACK
SI
75
76
SO
77
SCK
78
IC
79
XOUT
80
XIN
81
VDD
82
XCIN
83
XCOUT
84
RESET
85
BAT OFF
86
RXD
87
S. REQ
88~90
NOT USED
91~93
SCAN OUT0~2
94
WAKE UP
95
LCD ON
96
ASIC TEST 0
97
ASIC RESET
98
ASIC TEST 2
99
AVSS
100
BATTERY
I/O
I
Strobe charge voltage input (analog input)
I
Key matrix input
A/D converter analog power terminal
-
A/D converter standard voltage input terminal
I
Standby LED (red) ON/OFF signal
I
Standby LED (green) ON/OFF signal
O
-
GND
O
Self-timer LED ON/OFF signal
-
-
A/D standard power ON/OFF signal
O
Buzzer output
O
O
Flash charge ON/OFF signal
-
-
-
GND
-
-
O
DC/DC converter (analog) ON/OFF signal
O
DC/DC converter (digital) ON/OFF signal
I
DIN jack connect detection signal
Memory card attachment detection signal
I
I
AV output cable connection detection signal
I
Serial communication data input (←ASIC)
O
Serial communication data output (→ASIC)
O
Serial communication clock output (→ASIC)
-
Connect to GND
Main clock oscillation terminal
O
Main clock oscillation terminal (4 MHz)
I
-
VDD
I
Sub clock oscillation terminal
O
Sub clock oscillation terminal (32.768 kHz)
Reset input
I
Battery OFF detection signal
I
RS-232C RXD input terminal
I
I
Serial communication request signal
-
-
O
Key matrix output
Wake up signal
O
O
LCD monitor power ON/OFF signal
ASIC reset control signal
O
O
ASIC reset signal
O
ASIC reset control signal
-
Analog GND
I
Battery voltage input (analog input)
Table 4-1. 8-bit Microprocessor Port Specification
– 10 –
Outline
L : LED light
L : LED light
L : LED light
L : ON
H : ON
H : ON
H : ON
H : Connection
L : Attachment
H : Connection
L : OFF
L : Request
H : WAKE UP
H : ON
L : Reset output
L : Reset control
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