Philips DVDR3590H Service Manual page 26

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SDRAM (SDRAM OR DDR-RAM)
Nucleus Name
Nucleus Number
Description
Technical
Execution Time
User Input
Error
Example
Nucleus Name
Nucleus Number
Description
Technical
Execution Time
User Input
Error
Example
Nucleus Name
Nucleus Number
Description
Technical
Execution Time
User Input
Error
Example
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Firmware Upgrading & Diagnostic Software
DS_SDRAM_WriteRead
400
Check all data lines, address lines and memory locations of the RAM
- Test the data bus
- Test the address bus
- Test the integrity of the device itself (memory locations)
11 seconds for 32 Mb
23 seconds for 64 Mb
None
Number Description
40000 The write-read test succeeded
40001 The data bus contains an error
40002 The address bus contains an error
40003 The RAM itself contains an error
DS:> 400
040000:
Test OK @
DS_SDRAM_WriteReadFast
401
Check all data lines and address lines of the RAM
- Test the data bus
- Test the address bus
Less than 1 second
None
Number Description
40100 The write-read test succeeded
40101 The data bus contains an error
40102 The address bus contains an error
DS:> 401
040100:
Test OK @
DS_SDRAM_Write
402
Write to a specific un-cached memory address
- Decode the user input and check its ranges and alignment on 4 bytes
- Write the data to the RAM
Less than 1 second
1. The location that must be modified
(RAM starts at address 0xA0000000)
2. The value to put on the selected location
Number Description
40200 Writing to the RAM succeeded
40201 Writing to the RAM failed; Wrong user input
40202 Address is not dividable by 4
DS:> 402 0xa1000010 0xad112222
040200:
Test OK @