AT52BC3221AT View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT52BC3221AT

32-Mbit Flash + 8-Mbit PSRAM Stack Memory

Atmel Corporation 

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Figure 3. Toggle Bit Algorithm

(Configuration Register = 00)

START

Read I/O7 - I/O0

Read I/O7 - I/O0

Figure 4. Toggle Bit Algorithm

(Configuration Register = 01)

START

Read I/O7 - I/O0

Read I/O7 - I/O0

Toggle Bit =

NO

Toggle?

YES

NO I/O3, I/O5 = 1?

YES

Read I/O7 - I/O0

Twice

Toggle Bit =

NO

Toggle?

YES

NO I/O3, I/O5 = 1?

YES

Read I/O7 - I/O0

Twice

Toggle Bit =

NO

Toggle?

YES

Program/Erase

Operation Not

Successful, Write

Product ID

Exit Command

Program/Erase

Operation

Successful

Toggle Bit =

NO

Toggle?

YES

Program/Erase

Operation Not

Successful, Write

Product ID

Exit Command

Program/Erase

Operation

Successful,

Write Product ID

Exit Command

Note:

1. The system should recheck the toggle bit even if

I/O5 = “1” because the toggle bit may stop toggling

as I/O5 changes to “1”.

Note:

1. The system should recheck the toggle bit even if I/O5 =

“1” because the toggle bit may stop toggling as I/O5

changes to “1”.

10 AT52BC3221A(T)

3466A–STKD–11/04

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