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M50FW016

Figure 18. Quadruple Byte Program Flowchart and Pseudo Code (FWH Interface Only)

mand sequence.

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

3. A1 and A0 are treated as Don’t Care. Starting at the Start Address, the first data byte is programmed at the address that has A1-

A0 at 00, the second at the address that has A1-A0 at 01, the third at the address that has A1-A0 at 10, and the fourth at the address

that has A1-A0 at 11.

AI05736B

Read Status

Register

YES

NO

b7 = 1

YES

NO

b3 = 0

NO

b4 = 0

VPP Invalid

Error (1, 2)

Program

Error (1, 2)

Quadruple Byte Program command:

– write 30h

– write Start Address and 4 Data Bytes (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 b3 = 1, VPP invalid error:

– error handler

If b4 = 1, Program error:

– error handler

Suspend

Suspend

Loop

NO

YES

Write 30h

Start

Write Start Address

and 4 Data Bytes (3)

YES

End

YES

NO

b1 = 0

Program to Protected

Block Error (1, 2)

If b1 = 1, Program to protected block error:

– error handler