NX25F080A-3TI-R データシートの表示（PDF） - NexFlash -> Winbond Electronics

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NX25F080A-3TI-R

8M-BIT SERIAL FLASH MEMORY WITH 4-PIN SPI INTERFACE

NexFlash -> Winbond Electronics 

NX25F080A

Table 3. Command Set for the NX25F080A Serial Flash Memory

Command Name

Byte 0 Byte 1-2 Byte 3-4

n-bytes

(italics indicate device output)

1

Serial Flash Sector Commands

Read from Sector

Read from Sector Low Frequency

Write Enable*

Write Disable*

Write to Sector

Transfer SRAM to Sector

Transfer Sector to SRAM

Compare Sector with SRAM

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

51H sector addr. byte add. 0000H ready/busy

06H

00H

04H

00H

F3H sector addr. byte add.

write data

F3H sector addr. 0000H

54H sector addr. byte add.

clock 00H per byte

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

read data

read data

2

00H

3

00H

bit compare of data

4

Serial SRAM Program Buffer Commands

Write to SRAM**

Read from SRAM*

82H

0000H

byte add.

write data

00H

5

81H

0000H

byte add. 0000H

read/busy

read data

Transfer SRAM to Prog. Buffer

92H

0000H

0000H 0000H

Transfer Prog. Buffer to SRAM

Read from Program Buffer

55H

0000H

0000H 0000H

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*

Read Device Information Sector

89H

0000H

15H

0000H

0000H

0000H

ready/busy

8

read data

Notes:

1. * Command may be used when device is busy

9

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

SERIAL FLASH MEMORY 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[10:0] for the

NX25F080A (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 536-byte sector. Only B[9:0] of the byte-address field

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

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

217H (536 bytes) are valid.

NexFlash Technologies, Inc.

11

PRELIMINARY NXSF005C-0699

06/11/99 ©

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