UM1618 datasheet(22/51 Pages) STMICROELECTRONICS

22 / 51 page

API specification

UM1618

22/51

DocID024371 Rev 3

Comments

After performing a program, ‘ProgramVerify’ should be used to verify the programmed data

is correct or not.

‘FlashProgram’ checks the mainInterfaceFlag in the SSD configuration to decide which

interface to be used for the operation, the main interface or the alternate interface. User

should explicitly set this parameter before calling the function.

This function also provides a fas

ter method for user to perform, factory program. But the

feature cannot be performed if the data at “diary” location in the UTest NVM space contains

at least one zero at reset. In that case, each try to perform factory program cause the error

C55_ERROR_FACTORY_OP be returned.

If the selected main array blocks are locked for programming, those blocks are not

programmed, and ‘FlashProgram’ returns C55_OK.

If user wants to program to Large block space via alternate interface, this function still

returns C55_OK without doing any program operation.

It is impossible to program any Flash block when a program or erase operation has already

been in progress on C55 module. ‘FlashProgram’ returns C55_ERROR_BUSY when doing

so. However, user can use the ‘FlashSuspend’ function to suspend an on-going erase

operation on one block to perform a program operation on another block.

It is unsafe to read the data from the Flash partitions having one or more blocks being

programmed when ‘FlashProgram’ is running. Otherwise, it causes a Read-While-Write

error.

If user wants to do program for multi-programmable size, this function plays a role to kick-off

this operation by finishing program for the first programmable size after back-up all

necessary information to pCtxData variable. And programming from the second

programmable size is done within ‘FlashCheckStatus’ function. Thus, user must call

‘FlashCheckStatus’ to finish all his expected operations defined by size argument.

Assumptions

It assumes that the Flash block is initialized using a ‘FlashInit’ API. And Flash location must

be in erased state before calling ‘FlashProgram’ API.

2.7.6

ProgramVerify

Description

This function is to verify the previous program operation. It verifies if the programmed Flash

range matches the corresponding source data buffer. In case of mismatch, the failed

address, failed destination and failed source are saved and relevant error code are

returned.

This function only does verification for given number of bytes which can terminate this

function within expected time interval. Thus, if user wants to do Flash verification for large

size, the rest of information need to be verified is stored in “pCtxData” variable and

‘FlashCheckStatus’ must be called periodically to do the next verification for next destination

based on all data provided in “pCtxData”.

UM1618 Datasheet(PDF) 22 Page - STMicroelectronics

UM1618 Datasheet(HTML) 22 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 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL