M58LR128HT datasheet(24/112 Pages) STMICROELECTRONICS

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Command interface

M58LR128HT, M58LR128HB

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4.10

Buffer Enhanced Factory Program command

The Buffer Enhanced Factory Program command has been specially developed to speed up

programming in manufacturing environments where the programming time is critical.

It is used to program one or more Write Buffer(s) of 32 Words to a block. Once the device

enters Buffer Enhanced Factory Program mode, the Write Buffer can be reloaded any

number of times as long as the address remains within the same block. Only one block can

be programmed at a time.

If the block being programmed is protected, then the Program operation will abort, the data

in the block will not be changed and the Status Register will output the error.

The use of the Buffer Enhanced Factory Program command requires certain operating

conditions:

●

VPP must be set to VPPH

●

VDD must be within operating range

●

Ambient temperature TA must be 30°C ± 10°C

●

The targeted block must be unlocked

●

The start address must be aligned with the start of a 32 Word buffer boundary

●

The address must remain the Start Address throughout programming.

Dual operations are not supported during the Buffer Enhanced Factory Program operation

and the command cannot be suspended.

The Buffer Enhanced Factory Program Command consists of three phases: the Setup

Phase, the Program and Verify Phase, and the Exit Phase, Please refer to Table 6: Factory

commands for detail information.

4.10.1

Setup phase

The Buffer Enhanced Factory Program command requires two Bus Write cycles to initiate

the command.

●

The first Bus Write cycle sets up the Buffer Enhanced Factory Program command.

●

The second Bus Write cycle confirms the command.

After the confirm command is issued, read operations output the contents of the Status

data to program.

The Status Register P/E.C. Bit SR7 should be read to check that the P/E.C. is ready to

proceed to the next phase.

If an error is detected, SR4 goes high (set to ‘1’) and the Buffer Enhanced Factory Program

operation is terminated. See Status Register section for details on the error.

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