BR25H080F-2LB

16/28

Datasheet

Datasheet

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TSZ22111・15・001

TSZ02201-0R1R0G100330-1-2

27.Feb.2014 Rev.002

Timing Chart

1. Write enable (WREN) / disable (WRDI) cycle

○This IC has write enable status and write disable status. It is set to write enable status by write enable command, and

it is set to write disable status by write disable command. As for these commands, set CSB LOW, and then input the

respective ope codes. The respective commands accept command at the 7-th clock rise. Even with input over 7 clocks,

command becomes valid.

When to carry out write and write status register command, it is necessary to set write enable status by the write enable

command. If write or write status register command is input in the write disable status, commands are cancelled. And even in

the write enable status, once write and write status register command is executed. It gets in the write disable status. After

power on, this IC is in write disable status.

2. Read command (READ)

Product

number

Address

length

BR25H080F-2LB

A9-A0

By read command, data of EEPROM can be read. As for this command, set CSB LOW, then input address after read ope

code. EEPROM starts data output of the designated address. Data output is started from SCK fall of 23 clock, and from D7 to

D0 sequentially. This IC has increment read function. After output of data for 1 byte (8bits), by continuing input of SCK, data

of the next address can be read. Increment read can read all the addresses of EEPROM. After reading data of the most

significant address, by continuing increment read, data of the most insignificant address is read.

WREN (WRITE ENABLE): Write enable

Figure 35. Write enable command

Figure 36. Write disable

WRDI (WRITE DISABLE): Write disable

High-Z

14

1

1

0

0

3

7

1

2

D6

SO

CSB

SCK

SI

4

5

＊

A9

6

8

＊

＊

A0

A1

D7

23

30

24

D0

0

0

0

0

0

D2

D1

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

～ ～

Figure 37. Read command

*=Don’t Care

High-Z

6

03

7

12

4

5

CSB

SCK

SO

SI

0

0

00

0

1

1

0

High-Z

00

0

0

SI

01

0

0

03

1

2

4

7

CSB

SCK

5

6

SO