– 7 –
41~44
SCAN OUT3~0
O
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1-5. SY1 CIRCUIT DESCRIPTION
1. Configuration and Functions
For the overall configuration of the SY1 circuit, refer to the block diagram. The SY1 circuit 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
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
19
20
24
26
27
28
29
30
31
32
33
34
35
36
37
39
45
38
40
AVREF
AVSS
IC
VDD
REGC
VSS
XIN
XOUT
RESET
XCOUT
CLKSEL0
BAT_OFF
IR_IN
USB_DET
USB_TRIG
SREQ
BACKUP_CTL
CHG_CNT
FLMD1
NC
PRG SI
PRG SCK
MAIN RESET
DETCT
VF. LED (R)
VF. LED (G)
Vss
EVDD
P ON
PA ON
SCK
SI
SO
CHG ON
FLMD0
BOOT_COMREQ
I/O
I
-
-
-
-
-
I
-
I
O
O
I
I
I
I
I/O
O
O
-
I/O
I
O
O
I
O
O
-
-
O
O
O
I
O
O
O
I/O
Outline
Analog standard voltage input terminal
GND
Power for program writing
VDD
Regulator output stability capacity connection
GND
Main clock oscillation terminal (4MHz)
Reset input
Clock oscillation terminal
ARM system clock ON/OFF
Battery off detection signal input
Infrared remote control reception data (asynchronous)
USB power detection terminal (
↓
detection)
Cradle TRIG sw (
↑
detection)
Transmission clock for communication (SY-ASIC)
Backup battery charge control (L=charge)
Cradle charge permission signal (H=permission)
Hot line 2
Flash for serial data input
Flash for serial clock output
System reset (MRST)
Low can be detected constantly.
VF. LED (RED) (L=lighting)
VF. LED (GREEN) (L=lighting)
GND
VDD
D/D converter (digital system) ON/OFF signal
D/D converter (analog system) ON/OFF signal
Serial clock output
Serial data input
Serial data output
Strobo charge control
Flash writing control 0
Key matrix output
BOOT/command request
Flash writing control 1
10
XCIN
I
Clock oscillation terminal (32.768 kHz)
21
SCAN IN6
I
Keyscan input 6
22
LCD ON
O
D/D converter (LCD system) ON/OFF signal 1
23
BLON
O
LCD backlight ON signal (H=lighting)
Main clock oscillation terminal
25
PRG SO
O
Flash for serial data output
