Specifications
Functions
2-35
MEMORY CHECK
Variety of memory of the device is checked.
The memory check requires the following time. (1 count)
MAIN.SDRAM : Approx. 12 min.
MAIN.F-ROM : 1 sec.
HEAD.EEPROM : Approx. 22 sec.
Note: No. of counts is displayed during the check.
*1 When data does not agree, the check process is aborted, and memory address, write/read data at occurrence of the error are
displayed.
*2 As sector 1~10 used by parameter are passed, SUM value is not 0.
<Memory check>
Item Content
MAIN.SDRAM*
1
Read/Write check of SDRAM
Select insert/not insert of wait time (30sec) between data write and read.
In the checking the following process is counted as 1 and repeat until
[END]
is input.
1. 00000000h is written into from address 0 to all area of SDRAM.
2. Read vacant data from address 0 to all area of SDRAM sequentially to confirm the reading meet the
writing data.
3. FFFFFFFFh is written into from address 0 to all area of SDRAM.
4. Read vacant data from address 0 to all area of SDRAM sequentially to confirm the reading meet the
writing data.
5. Write increment data of 00010203h, 04050607h, ... FCFDFE00h into from address 0 to all area of
SDRAM.
6. Read vacant data from address 0 to all area of SDRAM sequentially to confirm the reading meet the
writing data.
MAIN.F-ROM Hash check of F-ROM.
In the checking, it is confirmed that long ward size SUM value from address 0 of F-ROM is
0001f000H*
2
, that is counted as 1, the process is repeated until
[END]
is input.
If the SUM value is not 0001f000H, the check process is aborted and an error is displayed.
HEAD.EEPROM*
1
Read/Write check of HEAD.EEPROM
Select a head unit to be checked.
Before starting the checking, save contents of EEPROM in S-RAM (head unit parameter area).
In the checking the following process is counted as 1 and repeat until
[END]
is input.
1. Write 00h in from address 0 of HEAD.EEPROM, confirm that read value is 00h
2. Write FFh in from address 0 of HEAD.EEPROM, confirm that read value is FFh.
3. Write increment data of 00h, 01h, 02h, ..., FDh, FEh, 00h, ...in from address 0 of HEAD.EEPROM,
confirm that read value agrees.