NX25F011A 查看數據表（PDF） - NexFlash -> Winbond Electronics

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NX25F011A

1M-BIT AND 4M-BIT SERIAL FLASH MEMORIES WITH 4-PIN SPI INTERFACE

NexFlash -> Winbond Electronics 

NX25F011A

NX25F041A

Table 3. Command Set for the NX25F011A, and NX25F041A Serial Flash Memory

n - bytes

Command Name

Byte 0 Byte 1-2 Byte 3-4

(italics indicate device output)

1

Serial Flash Sector Commands

Read from Sector

52H sector addr. byte add. 0000H ready/busy

Read from Sector Low Frequency 51H sector addr. byte add. 0000H ready/busy

read data

read data

2

Write Enable*

06H

00H

Write Disable*

04H

00H

Write to SectorF3H

sector addr. byte add.

write data

00H

3

Transfer SRAM to Sector

F3H sector addr. 0000H

Transfer Sector to SRAM

54H sector addr. byte add. clock 00H per byte

00H

Compare Sector with SRAM

86H sector addr. byte add. 0000H ready/busy

bit compare of data

4

Serial SRAM Program Buffer Commands

Write to SRAM**

Read from SRAM*

82H

0000H

byte add.

write data

81H

0000H

byte add. 0000H read/busy

00H

read data

5

Transfer SRAM to Prog. Buffer 92H

0000H

0000H 0000H

Transfer Prog. Buffer to SRAM 55H

0000H

0000H 0000H

Read from Program Buffer

91H

0000H

byte add. 0000H ready/busy

read data

6

Configuration and Status Commands

Read Configuration Register*

8BH

0000H

0000H 0000H ready/busy configuration

7

Write Configuration Register

8AH configuration 0000H

Read Status Register*

83H

0000H

0000H 0000H ready/busy

status

Clear Compare Status*

89H

0000H

8

Read Device Information Sector 15H

0000H

byte add. 0000H ready/busy

read data

Notes:

1. * Command may be used when device is busy

2. ** Command may not be used when device is busy and TR bit=0

9

SERIAL FLASH SECTOR COMMANDS

Read From Sector

Reading from a sector is accomplished by first bringing

CS low then shifting in the Read from Sector command

(52H) followed by its 16-bit “sector-address” field.

Although the sector-address field is 16-bits, only bits

S[8:0] for the NX25F011A (0-1FFH) and S[10:0] for the

NX25F041A (0-7FFH) are used. The uppermost sector

address bits are not used but must be clocked using 0

10

11 for data. Next a 16-bit “byte-address” field is clocked

into the device to designate the starting location within

the 264-byte sector. Only B[8:0] of the byte-address

12 field are used; the uppermost bits are not used but must

be clocked in (use 0 for data). Only byte-addresses of

0 to 107H (264 bytes) are valid.

NexFlash Technologies, Inc.

11

PRELIMINARY NXSF014B-0699

06/11/99

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