UM1620 datasheet(12/41 Pages) STMICROELECTRONICS

12 / 41 page

API specification

UM1620

12/41

DocID024388 Rev 3

Return values

Troubleshooting

Comments

When shadowFlag is set to FALSE, the ‘FlashErase()’ function erases the blocks in the main

array. It is capable of erasing any combination of blocks in the low, mid and high address

spaces in one operation. If shadowFlag is TRUE, this function erases the shadow row.

The inputs lowEnabledBlocks, midEnabledBlocks and highEnabledBlocks are bit-mapped

arguments that are used to select the blocks to be erased in the Low/Mid/High address

spaces of main array. The selection of the blocks of the main array is determined by

setting/clearing the corresponding bit in lowEnabledBlocks, midEnabledBlocks or

highEnabledBlocks.

The bit allocations for blocks in one address space are: bit 0 is assigned to block 0, bit 1 to

block 1, etc. The following diagrams show the formats of lowEnabledBlocks,

midEnabledBlocks and highEnabledBlocks for the C90FL module.

For low address space valid bits are from bit 0 to bit (lowBlockNum – 1). In which,

lowBlockNum is the number of low blocks returned from FlashInit();

For middle address space valid bits are from bit 0 and bit (midBlockNum – 1). In which,

midBlockNum is the number of middle blocks returned from FlashInit();

For high address space valid bits are from bit 0 to bit (highBlockNum – 1). In which,

highBlockNum is the number of high blocks returned from FlashInit();

Table 7. Return values for FlashErase()

Type

Description

Possible values

UINT32

Successful completion or error value.

C90FL_OK

C90FL_ERROR_BUSY

C90FL_ERROR_EGOOD

Table 8. Troubleshooting for FlashErase()

Error codes

Possible causes

Solution

C90FL_ERROR_BUSY

New erase operation cannot be

performed because there is

program/erase sequence in

progress on the Flash module.

Wait until all previous

program/erase operations on the

Flash module finish.

Possible cases that erase cannot

start are:

– erase in progress

(FLASH_MCR-ERS is high);

– program in progress

(FLASH_MCR-PGM is high);

C90FL_ERROR_ EGOOD

Erase operation failed.

Check if the C90FL is available

and high voltage is applied to

C90FL. Then try to do the erase

operation again.

UM1620 Datasheet(PDF) 12 Page - STMicroelectronics

UM1620 Datasheet(HTML) 12 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Datasheet Download

Link URL