M58LR128KB datasheet(24/110 Pages) NUMONYX

24 / 110 page

Command interface

M58LR128KT, M58LR128KB, M58LR256KT, M58LR256KB

24/111

Use n+1 bus write cycles to load the address and data for each word into the write

buffer. Addresses must lie within the range from the start address to the start

address + n, where the start address is the location of the first data to be programmed.

Optimum performance is obtained when the start address corresponds to a 32 word

boundary.

The final bus write cycle confirms the Buffer Program command and starts the program

operation.

All the addresses used in the Buffer Program operation must lie within the same block.

Invalid address combinations or failing to follow the correct sequence of bus write cycles

sets an error in the Status Register and aborts the operation without affecting the data in the

memory array.

If the Status Register bits SR4 and SR5 are set to '1', the Buffer Program command is not

accepted. Clear the Status Register before re-issuing the command.

If the block being programmed is protected an error sets in the Status Register and the

operation aborts without affecting the data in the memory array.

During Buffer Program operations the bank being programmed only accepts the Read Array,

Read Status Register, Read Electronic Signature, Read CFI Query and the Program/Erase

Suspend commands; all other commands are ignored.

Refer to Section 8: Dual operations and multiple bank architecture for detailed information

about simultaneous operations allowed in banks not being programmed.

See Appendix C, Figure 20: Buffer program flowchart and pseudocode for a suggested

flowchart on using the Buffer Program command.

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 aborts the data in

the block does not change, and the Status Register outputs the error.

The use of the Buffer Enhanced Factory Program command requires the following 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.

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