41

3638M–DFLASH–5/2013

AT45DB021D

Figure 19-11. Manufacturer and Device Read (Opcode 9FH)

20.

Auto Page Rewrite Flowchart

Figure 20-1. Algorithm for Programming or Reprogramming of the Entire Array Sequentially

Notes: 1. This type of algorithm is used for applications in which the entire array is programmed sequentially, filling the array

page-by-page

2. A page can be written using either a Main Memory Page Program operation or a Buffer Write operation followed by

a Buffer to Main Memory Page Program operation

3. The algorithm above shows the programming of a single page. The algorithm will be repeated sequentially for each

page within the entire array

SCK

CS

SI

SO

6

0

9FH

8

7

38

OPCODE

1FH

DEVICE ID BYTE 1

DEVICE ID BYTE 2

00H

HIGH-IMPEDANCE

14

16

15

22

24

23

30

32

31

Note: Each transition

shown for SI and SO represents one byte (8 bits)

START

MAIN MEMORY PAGE PROGRAM

THROUGH BUFFER

(82H)

END

provide address

and data

BUFFER WRITE

(84H)

BUFFER TO MAIN

MEMORY PAGE PROGRAM

(83H)