AT45DB321E datasheet(21/80 Pages) RENESAS

21 / 80 page

DS-AT45DB321E-8784 Rev. N

Page 21

9/1/23

AT45DB321E Datasheet

7.8

Block Erase

The Block Erase command can be used to erase a block of eight pages at one time. This command is useful when

needing to pre-erase larger amounts of memory and is more efficient than issuing eight separate Page Erase

commands.

To perform a Block Erase with the standard DataFlash page size (528 bytes), an opcode of 50h must be clocked

into the device followed by three address bytes comprised of one dummy bit, 10 page address bits (PA12 - PA3),

and 13 dummy bits. The 10 page address bits are used to specify which block of eight pages is to be erased.

To perform a Block Erase with the binary page size (512 bytes), an opcode of 50h must be clocked into the device

followed by three address bytes comprised of two dummy bits, 10 page address bits (A21 - A12), and 12 dummy

bits. The 10 page 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 device erases the selected block of eight pages. The

erase operation is internally self-timed and takes place in a maximum time of tBE. During this time, the RDY/BUSY

bit in the Status Register indicates that the device is busy.

The device also incorporates an intelligent erase algorithm that can detect when a byte location fails to erase

properly. If an erase error arises, it is indicated by the EPE bit in the Status Register.

Table 2. Block Erase Addressing

PA12/

A21

PA11/

A20

PA10/

A19

PA9/

A18

PA8/

A17

PA7/

A16

PA6/

A15

PA5/

A14

PA4/

A13

PA3/

A12

PA2/

A11

PA1/

A10

PA0/

Block

•

1020

1021

1022

1023

AT45DB321E 数据表(PDF) 21 Page - Renesas Technology Corp

AT45DB321E 数据表(HTML) 21 Page - Renesas Technology Corp

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 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

数据表下载