Owner manual

41
3638K–DFLASH–11/2012
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
60
9FH
87 38
OPCODE
1FH DEVICE ID BYTE 1 DEVICE ID BYTE 2 00H
HIGH-IMPEDANCE
14 1615 22 2423 30 3231
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)