AT25SF641B datasheet(14/62 Pages) RENESAS

14 / 62 page

DS-AT25SF641B-191 Rev. K

Page 14

2025-12-12

AT25SF641B Datasheet

1. OP = Opcode (command number), AD = Address. DA = Data. 0 indicates the corresponding transfer does not occur in that command.

1 indicates the transfer does occur. For example, 1-0-0 indicates a command transfer occurs, but no address or data transfers occur.

Op: Opcode or Commands (8-bits): 0 => No Opcode [continuous Read], 1 => 8 clocks for Opcode, 2 => 4 clocks for Opcode,

4 => 2 clocks for opcode.

AD: Address (24-bits) Only: 0 => No address, Opcode only operation, 1 => 24 clocks for Address, 2 => 12 clocks for address,

4 => 6 clocks for address.

AD: Address (24-bits) + Mode (8-bits): 2 => 12 clocks for address, 4 clocks for mode [BBh only], 4 => 6 clocks for address,

2 clocks for mode [EBh and E7h].

DA: Data(8-bits): 1 => 8 clocks for byte, 2 => 4 clocks for byte, 4 => 2 clocks for byte.

Erase Commands

Block Erase (4 kbytes)

20h

1-1-0

Block Erase (32 kbytes)

52h

1-1-0

Block Erase (64 kbytes)

D8h

1-1-0

Chip Erase

C7h/60h

1-0-0

Suspend/Resume Commands

Program/Erase Suspend

75h

1-0-0

Program/Erase Resume

7Ah

1-0-0

Status Register Commands

Read Status Register 1

05h

1-0-1

Read Status Register 2

35h

1-0-1

Read Status Register 3

15h

1-0-1

Write Status Register 1

01h

1-0-1

Write Status Register 2

31h

1-0-1

Write Status Register 3

11h

1-0-1

Device Information Commands

Manufacturer/Device ID

90h

1-1-1

Mfgr./Device ID Dual I/O

92h

1-2-2

Mfgr./Device ID Quad I/O

94h

1-4-4

Read JEDEC ID

9Fh

1-0-1

Read Serial Flash Discoverable

Parameter

5Ah

1-1-1

OTP Commands

Erase Security Registers

44h

1-1-0

Program Security Registers

42h

1-1-1

Read Security Registers

48h

1-1-1

Read Unique ID Number

4Bh

1-0-1

Table 4. AT25SF641B Command Table (continued)

Command Name

Command

Opcode

Bus Transfer Type

(OP-AD-DA)(1)

Mode Bit

Present

Mode Bit

Clocks

Wait Cycle

Dummy Clocks

# of Data

Bytes

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