Casio CE-T300 Service Manual page 27

7) Flash2 ROM and Flash pack check
This test will check the Flash 2 ROM and Flash pack. This test will perform the erase,
write, and verify check.
Operation :
NOTE1: During this test, the LED of receipt switch will blink. In the repeat test, the
machine will display the repeat count number on the segment display. When the
error is happened, the machine will issue an error receipt.
NOTE2: The erase, write and verify check will perform the following procedure.
And, the last step, the all block data will be cleared.
1) The designated block (64 Kbytes) will be erased.
( The data will be cleared after the block protect released. )
2) The test data will be stored in the block area ( 64 Kbytes ).
The test data is made by the test address/bank.
Test data (8bits) = Block No. + address(Middle 8 bits) + address(Lower 8 bits)
3) Verify the designated block ( 64 Kbytes ).
[PRINT]
s n X 3 #2 Key
s: 0= Select Flash2 (Not used for CE-T300)
1= Select Flash pack
X: 5= Test by one block (64 bytes)
Select the block by the Number n (from 0 to 7).
6= Test the all block. After test, the all block data is cleared.
In this case, number n will have the following function select.
n: 1= Repeat check (After finished all block check, start the
check from 0 block again. To stop this check, set mode
switch to off position.)
2= Read only check (The erase and write test are not
performed in the each block. Therefore, perform the
erase and write test "command 263 #2" before this test.)
4= The erase and write test only. (Non data clear after test)
6= Blank check (check 0FFH)
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[DISPLAY]
Segment display
Error address
The beginning address of Flash chip is
"000000".
Error code
Error code is made by Flash controller device.
Error receipt
ERASE ERR!! 000000 00
WR ERR!! 000000 00
RD ERR!! 000000 43
no PACK ERR!! 000000 01
WR PROTECT!! 040000 FF