IS25F011A 데이터 시트보기 (PDF) - Integrated Silicon Solution

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IS25F011A

1M-BIT, 2M-BIT, AND 4M-BIT SERIAL FLASH MEMORIES WITH 4-PIN SPI INTERFACE

Integrated Silicon Solution 

IS25F011A

IS25F021A

IS25F041A

ISSI ®

Table 3. Command Set for the IS25F011A, IS25F021A, and IS25F041A 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

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

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 Sector*

Read Device Information Sector

89H

0000H

15H

0000H

byte add. 0000H ready/busy

read data

8

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. Al-

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

S[8:0] for the IS25F011A (0-1FFH), S[9:0] for the

IS25F021A (0-3FFH), S[10:0] for the IS25F041A

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

10

11

are not used but must be clocked using 0 for data. Next

a 16-bit “byte-address” field is clocked into the device

12 to designate the starting location within the 264-byte

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

Integrated Silicon Solution, Inc.

11

PRELIMINARY SF001-1A

06/24/98

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