AT45DB041B-RU datasheet(7/35 Pages) ATMEL

7 / 35 page

3443C–DFLSH–5/05

AT45DB041B

Successive page programming operations without doing a page erase are not recommended. In

other words, changing bytes within a page from a “1” to a “0” during multiple page programming

operations without erasing that page is not recommended.

5.2.4

Page Erase

The optional Page Erase command can be used to individually erase any page in the main

memory array allowing the Buffer to Main Memory Page Program without Built-in Erase com-

mand to be utilized at a later time. To perform a Page Erase, an opcode of 81H must be loaded

into the device, followed by four reserved bits, 11 address bits (PA10 - PA0), and nine don’t care

bits. The 11 address bits are used to specify which page of the memory array is to be erased.

When a low-to-high transition occurs on the CS pin, the part will erase the selected page to 1s.

The erase operation is internally self-timed and should take place in a maximum time of t

PE. Dur-

ing this time, the status register will indicate that the part is busy.

5.2.5

Block Erase

A block of eight pages can be erased at one time allowing the Buffer to Main Memory Page Pro-

gram without Built-in Erase command to be utilized to reduce programming times when writing

large amounts of data to the device. To perform a Block Erase, an opcode of 50H must be

loaded into the device, followed by four reserved bits, eight address bits (PA10 - PA3), and 12

don’t care bits. The eight address bits are used to specify which block of eight pages is to be

erased. When a low-to-high transition occurs on the CS pin, the part will erase the selected

block of eight pages to 1s. The erase operation is internally self-timed and should take place in a

maximum time of t

BE. During this time, the status register will indicate that the part is busy.

Table 5-2.

Block Erase Addressing

PA10

PA9

PA8

PA7

PA6

PA5

PA4

PA3

PA2

PA1

PA0

Block

000

0000

000

0001

000

0010

000

0011

•

111

1100

252

111

1101

253

111

1110

254

111

1111

255

AT45DB041B-RU Datasheet(PDF) 7 Page - ATMEL Corporation

AT45DB041B-RU Datasheet(HTML) 7 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Datasheet Download

Link URL