M50FW016 Datasheet, PDF (39/45 Pages) STMicroelectronics – 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory

M50FW016
Figure 18. Quadruple Byte Program Flowchart and Pseudo Code (FWH Interface Only)
Start
Write 30h
Write Start Address
and 4 Data Bytes ⁽³⁾
Read Status
Register
NO
Suspend
YES
NO
b7 = 1
YES
Suspend
Loop
NO
b3 = 0
VPP Invalid
Error (1, 2)
YES
NO
b4 = 0
Program
Error (1, 2)
YES
b1 = 0
NO
Program to Protected
Block Error (1, 2)
YES
End
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
If b1 = 1, Program to protected block error:
– error handler
AI05736B
Note: 1. A Status check of b3 (V_PP invalid) and b4 (Program Error) can be made after each Program operation by following the correct com-
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.
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