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M50LPW041

Figure 15. Quadruple Byte Program Flowchart and Pseudo Code (A/A Mux Interface Only)

Note: 1. A Status check of b4 (Program Error) can be made after each Program operation by following the correct command sequence.

2. If an error is found, the Status Register must be cleared before further Program/Erase Controller operations.

3. Address 1, Address 2, Address 3 and Address 4 must be consecutive addresses differing only for address bits A0 and A1.

AI06819

Write Address 4

& Data 4 (3)

Read Status

Register

YES

NO

b7 = 1

NO

b4 = 0

Program

Error (1, 2)

Quadruple Byte Program command:

– write 30h

– write Address 1 & Data 1 (3)

– write Address 2 & Data 2 (3)

– write Address 3 & Data 3 (3)

– write Address 4 & Data 4 (3)

(memory enters read status state after

the Quadruple Byte Program command)

do:

– read Status Register if Program/Erase

Suspend command given execute

suspend program loop

while b7 = 1

If b4 = 1, Program error:

– error handler

End

YES

Suspend

Suspend

Loop

NO

YES

Write 30h

Start

Write Address 1

& Data 1 (3)

Write Address 2

& Data 2 (3)

Write Address 3

& Data 3 (3)