Upgrading The Firmware - Olympus OEP-3 Service Manual

Viewing the display of sensor adjustment value
(Example) 84 f5 0f 80
One-byte data is displayed using a hexadecimal code. In each sensor, data is arranged in the
order of "light-emitting level value", "high-level value", "low-level value", and "threshold
level value" from the beginning.
(For the data described above, the LED voltage value is 84, the high-level value of PHTR is
f5, the low-level value of PHTR is 0f, and the threshold level value is 80.)
Converting the displayed data into the voltage value of a sensor
The displayed data indicates the value obtained when the voltage level (0 to 5.0 V) of each sensor is
divided by 256. Therefore, the voltage value indicated using a hexadecimal code is obtained from the
calculation below.
(Example) When the hexadecimal code is H 'b3:
H 'b3 = D' 179 (← The hexadecimal display is converted into a decimal display.)
5.0 (v) x 179/256 = 3.4 (v) (← Voltage value of sensor indicated by H 'b3)

3-3. Upgrading the Firmware

3-3-1. Firmware
The PRT-13 board is flash memory in which IC6 stores starting ROM and in which IC12 stores firmware.
Introduction of the flash memory into program storage memory enables the firmware to be upgraded
through an RS-232C interface. The upgraded data is received by the SY-282 board. After that, it is sent
to the PRT-13 board via serial communication. After the PRT-13 board receives all data, it carries out a
checksum. If no error is detected in data, the rewrite operation of the flash memory is started.
The address map of firmware is shown below.
H'00000
ROM (IC6)
H'20000
FLASH
H'40000
In a program, IC6 first operates. IC6 carries out the checksum of IC12. If the contents of a program are
normal, IC6 moves to IC12 and enters the normal operation. If the contents of IC12 are abnormal, IC6
does not move and displays the message below on LCD so as to notify that upgrading is required.
n
If the message below appears on the LCD display, upgrade the firmware first.
UPGRADE FIRMWARE
REQUEST PRT
OEP-3 V1 (UC)
3-13