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3. FLOW CHART
3-1. Camera Mode Flow Chart
The camera mode flow chart is shown in Fig. 3-1. Operation in the camera
mode is described in the following order.
mode is described in the following order.
3-1-1. Checking the Memory Stick
When the main power is turned on, the HI Controller immediately reads
out the status of the memory stick (memory stick is abbreviated as MS
hereafter.)
out the status of the memory stick (memory stick is abbreviated as MS
hereafter.)
• Checking if MS is used or not ............................. NO MEMORY STICK
• Checking the protection status of MS ...... MEMORY STICK LOCKED
• Checking the protection status of MS ...... MEMORY STICK LOCKED
When an MS is found to be write-protected from the result of MS check,
the respective alarms are displayed on LCD screen as the error messages.
the respective alarms are displayed on LCD screen as the error messages.
3-1-2. Reading the Contents of Memory Stick
When an MS is found to be ready to write and read data, the DIR data and
the FAT data are read, the DOS/V format is checked and wait for camera
shooting. If any data error is found, the message “FORMAT ERROR”
appears.
the FAT data are read, the DOS/V format is checked and wait for camera
shooting. If any data error is found, the message “FORMAT ERROR”
appears.
3-1-3. Processing and Storing the Picture Data
When the HI Controller receives the output signal from the SHUTTER (or
RELEASE) button, the camera signal is memorized in the SDRAM (IC252).
In the SDRAM (IC252), the memorized camera picture signal is compressed
of its data amount to about 1/5 of the original data by the JPEG compres-
sion system, and is memorized in the other SDRAM (IC455). The com-
pressed data in conformity with the JPEG compression standard is finally
stored (written) in an MS.
The JPEG compression is described in the separate section of this docu-
ment.
The filename, JPEG file, DIR data and FAT data are saved when writing
data into an MS.
RELEASE) button, the camera signal is memorized in the SDRAM (IC252).
In the SDRAM (IC252), the memorized camera picture signal is compressed
of its data amount to about 1/5 of the original data by the JPEG compres-
sion system, and is memorized in the other SDRAM (IC455). The com-
pressed data in conformity with the JPEG compression standard is finally
stored (written) in an MS.
The JPEG compression is described in the separate section of this docu-
ment.
The filename, JPEG file, DIR data and FAT data are saved when writing
data into an MS.
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