FlashProgramming < DaqSlowControl

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-- Main.AttilioTarantola - 26 Apr 2009

The OEPB flash programming over ETRAX.

1)ETRAX takes OEPB configuration file.

2)ETRAX does block write with increasing addresses and writes 32 bits dataword
in the following addresses:

address nr: 0-63 data (64 addresses x 32bits = 2048 bits =1 flash page)

address nr: 64: flash page number

address nr: 65: flash programming status

address nr: 64: flash control register

3)ETRAX sends 1 page->MDC addon->OEPB

4)OEPB loads page by page in a RAM and then to FLASH

5)OEPB writes control register.
The process is repeated for all pages.

  *Main Commands for Macronix (MX25L1605D) for OEPB*

|*Command Name*|Command|*Send Data at Command*|*Receive data at Command*|*Comments*|
|WREN| x"06"    | - | - |enable write|
|WRDI| x"04"    | - | - |reset write enable|
|RDSR| x"05"    | - | 2 byte |readout status register|
|CP  | x"AD"    |3 byte(ADD) + 2 byte(DUMMY DATA) + XX DATA |-|send all data at once. Add. auto increase|
|CE  | x"60"    |   -|   - |erase whole chip|
|PP  | x"PP"    |3 byte(ADD) + 1 byte (DATA)|-|program selected page|
|REMS| x"90"    |2 DUMMY byte|2 byte|output manufacturer ID and device ID|
| | ||||

*Possible command sequence for  OEPB*

|*Sequence Number*|Command|*Comment*|
|0             | RDSR | if Block Protect = 0 then CE can be executed |
|1             | CE |erase whole chip|
|2             | RDSR | be sure CE has been executed|
|3             | WREN |enable write|
|4             | CP |continuously write data|
|5             | WRDI | reset write enable|
|6             | RDSR | be sure CP mode is ended |
|              |   ||

Topic revision: r4 - 27 Oct 2009, JanMichel

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