收藏本站
BR24T □□□□ Series
Technical Note
● Read Command
○ Read cycle
Data of EEPROM is read. In read cycle, there are random read cycle and current read cycle. Random read cycle is a
command to read data by designating address, and is used generally. Current read cycle is a command to read data of
internal address register without designating address, and is used when to verify just after write cycle. In both the read
cycles, sequential read cycle is available, and the next address data can be read in succession.
S
T
A
R
T
SLAVE
ADDRESS
W
R
I
T
E
WORD
ADDRESS(n)
S
T
A
R
T
SLAVE
ADDRESS
R
E
A
D
DATA(n)
S
T
O
P
SDA
LINE
1 0 1 0 A2 A1 A0
WA
7
WA
0
1 0 1 0 A2 A1 A0
D7
D0
*1
As for WA7,BR24T01-W become Don’t care.
Note)
R A *1
/ C
W K
A
C
K
R A
/ C
W K
A
C
K
Fig.43 Random read cycle (BR24T01/02/04/08/16-W)
S
T
A
R
T
SLAVE
ADDRESS
W
R
I
T
E
1st WORD
ADDRESS
（ ）
2nd WORD
ADDRESS(n)
S
T
A
R
T
SLAVE
ADDRESS
R
E
A
D
DATA(n)
S
T
O
P
SDA
LINE
1 0
1 0 A2 A1 A0
WA WA WA WA WA
15 14 13 12 11
WA
0
10 1 0
A2 A1 A0
D7
D0
*1 As for WA12, BR24T32-W become Don’t care.
As for WA13, BR24T32/64-W become Don’t care.
As for WA14, BR24T32/64/128-W become Don’t care.
Note)
R A
/ C
*1
A
C
A
C
R A
/ C
A
C
As for WA15, BR24T32/64/128/256-W become Don’t care.
W K
K
K
W K
K
Fig.44 Random read cycle (BR24T32/64/128/256/512/1M-W)
S
T
A
R
T
SLAVE
ADDRESS
R
E
A
D
DATA(n)
S
T
O
P
*1 As for WA7, BR24T01-W becomes Don't care.
*2 As for BR24T01/02-W becomes (n+7)
SDA
LINE
1 0 1 0 A2 A1 A0
Note)
R A
/ C
W K
D7
D0
A
C
K
Fig.45 Current read cycle
S
T
A
R
T
SLAVE
ADDRESS
R
E
A
D
DATA(n)
DATA(n+x)
S
T
O
P
*1
As for WA12, BR24T32-W becomes Don't care.
As for WA13, BR24T32/64-W becomes Don't care.
As for WA14, BR24T32/64/128-W becomes Don't care.
As for WA15, BR24T32/64/128/256-W becomes Don't care.
SDA
LINE
1 0 1 0 A2 A1 A0
D7
D0
D7
D0
*2
As for BR24T128/256-W becomes (n+63)
As for BR24T512-W becomes (n+127)
R A
A
A
A
As for BR24T1M-W becomes (n+255)
Note ）
/ C
W K
C
K
C
K
C
K
Fig.46 Sequential read cycle (in the case of current read cycle)
? In random read cycle, data of designated word address can be read.
? When the command just before current read cycle is random read cycle, current read cycle (each including sequential
read cycle), data of incremented last read address (n)-th address, i.e., data of the (n+1)-th address is output.
? When ACK signal 'LOW' after D0 is detected, and stop condition is not sent from master (μ-COM) side, the next
address data can be read in succession.
? Read cycle is ended by stop condition where 'H' is input to ACK signal after D0 and SDA signal is started at SCL
signal 'H' .
? When 'H' is not input to ACK signal after D0, sequential read gets in, and the next data is output.
Therefore, read command cycle cannot be ended. When to end read command cycle, be sure input stop condition to
input 'H' to ACK signal after D0, and to start SDA at SCL signal 'H'.
? Sequential read is ended by stop condition where 'H' is input to ACK signal after arbitrary D0 and SDA is started at SCL
signal 'H'.
Note)
*1 *2 *3
1 0 1 0 A2 A1 A0
*1
*2
*3
In BR24T16-W, A2 becomes P2.
In BR24T08/16-W, A1 becomes P1.
In BR24T08/16/1M-W, A0 becomes P0.
Fig.47 Difference of slave address of each type
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
11/21
2011.03 - Rev.A
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
BR25L640F-WE2 IC EEPROM SER 64KB SPI BUS 8SOP
BR25S128GUZ-WE2 IC EEPROM SPI 128KB 12-WLCSP
BR25S256F-WE2 IC EEPROM SPI 256KB 20MHZ 8-SOP
BR34E02FVT-WE2 IC EEPROM SPD 2KB I2C 8TSSOP
BR34L02FV-WE2 IC EEPROM 2KBIT 400KHZ 8SSOP
BR93L76RFVJ-WE2 IC EEPROM 8KBIT 2MHZ 8TSSOP
BS08D-112 TRIGGER BILTRL SW 175MA TO-92
BU04P-TZ-S TZ CONN 4 POS SINGLE ROW
相关代理商/技术参数
BR24T256FVWGE2 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256FVWGTR 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256F-WE2 功能描述:电可擦除可编程只读存储器 Hi-Rel Serial 电可擦除可编程只读存储器 of I2C BUS RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
BR24T256FWGE2 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256FWGTR 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256NUXWGE2 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256NUXWGTR 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Serial EEPROMs
BR24T256-W 制造商:ROHM Semiconductor 功能描述: