2. Internal Communication Bus

The SY1 circuit board carries out overall control of camera operation by detecting the input from the keyboard and the condition of the camera circuits. The 8-bit microprocessor reads the signals from each sensor element as input data and outputs this data to the camera circuits (ASIC) or to the LCD display device as operation mode setting data. Fig. 4-1 shows the internal communication between the 8-bit microprocessor and ASIC.

 

 

 

 

S. REQ

 

 

 

ASIC

 

 

 

 

 

 

 

8-bit

 

ASIC SO

 

 

 

 

 

 

 

 

 

 

 

 

32 bit

microprocessor

 

 

 

 

 

 

 

 

 

 

 

ASIC SI

 

 

CPU

 

 

 

 

 

 

 

 

 

ASIC SCK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RESET

 

Fig. 4-1 Internal Bus Communication System

3. Key Operaiton

For details of the key operation, refer to the instruction manual.

SCAN

 

 

 

 

 

SCAN IN

0

1

2

3

4

OUT

 

 

 

 

 

0

 

 

 

 

MACRO

1

SHUTTER 1st

SHUTTER 2nd

CAMERA

PLAY

-

2

BARRIER

CARD LID

MODE

SET

TEST

 

 

 

 

 

 

Table 4-2. Key Operation

10