XC2000 datasheet(91/647 Pages) INFINEON

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XC2000 Derivatives

System Units (Vol. 1 of 2)

Memory Organization

Preliminary

User’s Manual

3-29

V1.0, 2007-06

MemoryX2K, V1.1

The high order bits XX should address the target page. The IMB Core takes always the

page address that was used by the last “Enter Page Mode” command.

When the 128-bit block assembly register of the IMB Core is filled completely after 8

“Load Page Word” commands the IMB Core calculates the 9 ECC bits and transfers the

block into the assembly buffer of the flash module. After that it sets the write pointer of

the block assembly register back to zero. The following 8 “Load Page Word” commands

fill again the block. After all 8 blocks are filled the “Program Page” command can be

used to trigger the program process that transfers the assembly buffer content into the

flash array.

While the IMB Core transfers the completed block assembly register to the flash module

it can not accept new data for a few cycles. A “Load Page Word” command arriving

during this time is stalled by the IMB Core.

If “Program Page” is called before all blocks of the assembly buffer have received new

data then the remaining bits are cleared.

If more than 8 times 8 commands are used the additional data is lost. The overflow

condition is indicated by the sequence error flag, but the execution of a following

“Program Page” command is not suppressed (the page mode is not aborted).

When a “Load Page Word” command is received and the flash is not in page mode, a

sequence error is reported in IMB_FSR with SQER flag. In case of a new “Enter Page

Mode” command or a “Reset to Read” command during page mode, or in case of an

Application Reset, the write data in the assembly buffer is lost. The current page mode

is aborted and in case of a new “Enter Page Mode” command entered again for the new

address.

Program Page

Arguments: –

Definition:

MOV XXAAH, XXA0H

MOV XX5AH, XXAAH

Timing: 2-cycle command that sets “BUSY” for the whole programming duration.

Description: The assembly buffer of the flash module is programmed into the flash array.

If the last block of data was not filled completely this command finalizes its ECC

calculation and copies its data into the assembly buffer before it starts the program

process. The selection of the flash module and the page to be programmed depends on

the page address used by the last “Enter Page Mode” command. The user software

should always address the targeted page.

The programming process is autonomously performed by the selected flash module. The

CPU is not occupied and can continue with its application.

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