5-7
3-13) RAM Check
a.
Test Procedure
With the above key operation, the RAM check is started.
At first, the address touch on address lines in all RAM area is
checked.
<For example the address touch test in all RAM area>
To check the following address
0x61000000
、
0x61000001
、
0x61000002
、
0x61000004
0x61000008
、
0x61000010
、
0x61000020
、
0x61000040
0x61000080
、
0x61000100
、
0x61000200
、
0x61000400
0x61000800
、
0x61001000
、
0x61002000
、
0x61004000
0x61008000
、
0x61010000
、
0x61020000
To write ‘55h’ to 0x61000000
To write ‘AAh’ to other than 0x61000000
To check the data in 0x61000000, if 55h is written, the result is
OK. If not, result is NG.
To check the data in the other than 0x61000000, if ‘AAh’ is
written, the results is OK, if not, result is NG
To write ‘55h’ to 0x61000001
To write ‘AAh’ to other than 0x61000001
To check the data in 0x61000001, if 55h is written, the result is
OK. If not, result is NG.
To check the data in the other than 0x61000001, if ‘AAh’ is
written, the results is OK, if not, result is NG
To write ‘55h’ to 0x61020000
To write ‘AAh’ to other than 0x61020000
To check the data in 0x61020000, if 55h is written, the result is
OK. If not, result is NG.
To check the data in the other than 0x61020000, if ‘AAh’ is
written, the results is OK, if not, result is NG
Secondly, the write & verify test is executed.
The different writing data are written in to each address.
<For example>
Address Written data
0x6100_0000
～
0x6101_FFFF 00h write & verify
0x6100_0000
～
0x6101_FFFF FFh write & verify
0x6100_0000
～
0x6101_FFFF 55h write & verify
0x6100_0000
～
0x6101_FFFF AAh write & verify
The test result is displayed and printed out then test is finished
when the [TL] key pushed.
b.
Test result print
When a test result is OK, following result is printed out
When a test result is NG, following result is printed out
RAM CHECK OK
RAM CHECK NG
