BR25H010F-2LB Datasheet, PDF (17/31 Pages) Rohm – Serial EEPROM Series Industrial EEPROM 125℃ Operation SPI BUS EEPROM

BR25H010F-2LB
3. Write command (WRITE)
CSB
～～
SCK
SI
0 1 2 3 4 5 6 7 89
～～
0 0 0 0 ＊0
10
～～
＊ A6 A5 A4 ～ ～
SO ^High-Z
～～
Figure 38. Write command
15 16
A1 A0 D7 D6
～～
～～
22 23
～～
～ ～ D2 D1 D0
～～
*=Don’t Care
CSB
～～
～～
SCK
SI
01 2 3 4 5 6 7 8
～～
00 0 0
*⁰
10
* A6 ～ ～
12 ～ ～
～～
A3 ～ ～
SO ^High-Z
～～
15 16 17
A1 A0 D7 D6
～～
CSB 立ち上げ有効区間
～～
～ ～ (8n+16)-8(8n+16)-7(8n+16)-2 (8n+16)-1 8n+16
22 23 24 25
～～
～～
～～
～ ～ D1 D0 D7 D6
D7 D6
D0
～～
*=Don’t Care
Figure 39. N Byte page write command
Datasheet
Product
number
BR25H010F-2LB
Address
length
A6-A0
n= up to 16 bytes
By write command, data of EEPROM can be written. As for this command, set CSB LOW, then input address and data
after write ope code. Then, by making CSB HIGH, the EEPROM starts writing. The write time of EEPROM requires time of
tE/W (Max 4ms). During tE/W, other than status read command is not accepted. Start CSB after taking the last data (D0),
and before the next SCK clock starts. At other timing, write command is not executed, and this write command is
cancelled. This IC has page write function, and after input of data for 1 byte (8 bits), by continuing data input without
starting CSB, data up to 16 bytes can be written for one tE/W. In page write, the insignificant 4 bit of the designated
address is incremented internally at every time when data of 1 byte is input and data is written to respective addresses.
When data of the maximum bytes or higher is input, address rolls over, and previously input data is overwritten.
Write command is executed when CSB rises between the SCK clock rising edge to recognize the 8th bits of data input and
the next SCK rising edge. At other timings the write command is not executed and cancelled (Figure.48 valid timing c). In
page write, the CSB valid timing is every 8 bits. If CSB rises at other timings page write is cancelled together with the write
command and the input data is reset.
This column addresses are
Top address of this page
16byte
page0 00h 01h 02h ･･･ 0Eh 0Fh
page 1 10h 11h 12h ･･･ 1Eh 1Fh
page 2 20h 21h 22h ･･･ 2Eh 2Fh
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
・
page m-1 n-31 n-30 n-29 ･･･ n-17 n-16
page ^*2 m n-15 n-14 n-13 ･･･
n-1
*1 _n
This column addresses are
the last address of this page
Figure 40. EEPROM physical address for Page write command (16Byte)
*1 n=127d=7Fh : BR25H010F-2LB
*2 m=7 : BR25H010F-2LB
www.rohm.com
©2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
17/28
TSZ02201-0R1R0G100300-1-2
27.Feb.2014 Rev.002