Eeprom Read - Epson AcuLaser C8500 Service Manual

EPSON AcuLaser C8500

4.2.5.12 EEPROM Read

This lets you read and check the data stored in the MCU PWB
EEPROM(NVM).
Table 4-15. EEPROM Read Parameter
DIAGON command: [75]
DIAG Command (EEPROM Read) : [90 05 XX XX]
DIAG Command (EEPROM Read) : Unnecessary
Parameter Function
1 Diagnostics Type
2 Code_EP
3 Code_EP
4 Data
5 Data
6 Data
7 Data
Status present ( [90 05 XX XX XX XX XX XX])
NOTE: Code_EP (NVM number) must be entered in 2 bytes in order
from the least significant.
NOTE: Status data is displayed in 4 bytes in order from the least
significant.
NOTE: There are three kinds of data of 1Byte, 2Byte and 4Byte in
Code_EP (NVM number). But, be careful with the status
because it becomes the indication of 4Byte completely.
1Byte of the lowest rank in 4Byte becomes Data of the
appropriateness NVM number by the thing of 1Byte, and other
3Bytes data indicates data of other NVM numbers.
2Byte of the lowest rank in 4Byte becomes Data of the
appropriateness NVM number by the thing of 2Byte, and other
2Bytes data indicates data of other NVM numbers.
NOTE: When data is a negative value, values decrease from [FFh]: [-1]
= [FFh], [-2] = [FFh], etc.
Chapter 4 Diagnostics
DIAGOFF command: [76]
Data (hex)
05 : EEPROM Read
NVM number (see "2.6.15 NVM List")
NVM number (see "2.6.15 NVM List")
[Status only] data
[Status only] data
[Status only] data
[Status only] data
EX) [Command]
90 01 0E 07
NVM Number 748(2ECh):
The accumulation value
for the BELT CLEANER ASSY
EEPROM Read
DIAGSTART Command
EX) [Status]
90 05 EC 02 A0 86 01 00
NVM Number 748(2ECh):
The accumulation value
for the BELT CLEANER ASSY
EEPROM Read
DIAGSTART Command
NOTE:When MCU PWB is exchanged, though it is being made a
principle that exchange of EEPROM (NVM : U2) is done, begin
to read the following NVM number from MCU PWB before the
exchange surely, and do [EEPROMRead], and write down value
when exchange of EEPROM isn't made. (Do Log Save.) And,
recommend it when you do Read Out of the following NVM
number and write down value to grasp use conditions if
necessary when others maintain it.
Revision C
Data: 100000(186A0h)
4-46