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BR24A Datasheet(PDF) 4 Page - Rohm

Part No. BR24A
Description  High Reliability Series EEPROMs I2C BUS
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Maker  ROHM [Rohm]
Homepage  http://www.rohm.com
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BR24A Datasheet(HTML) 4 Page - Rohm

 
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BR24A□□-WM series
Technical Note
4/17
www.rohm.com
2009.08 - Rev.C
© 2009 ROHM Co., Ltd. All rights reserved.
Block diagram
Fig.2 Block diagram
Pin assignment and description
Terminal
name
Input /
output
Function
BR24A01A-WM BR24A02-WM BR24A04-WM BR24A08-WM BR24A16-WM BR24A32-WM BR24A64-WM
A0
Input
Slave address setting
Not connected
Slave address setting
A1
Input
Slave address setting
Not connected
Slave address setting
A2
Input
Slave address setting
Not used
Slave address setting
GND
-
Reference voltage of all input / output, 0V
SDA
Input /
output
Slave and word address, Serial data input serial data output
SCL
Input
Serial clock input
WP
Input
Write protect terminal
Vcc
-
Connect the power source.
1Kbit~64Kbit EEPROM array
Control circuit
High voltage
generating circuit
Power source
voltage detection
7bit
8bit
9bit
10bi
t
11bit
12bit
13b
it
Address
decoder
Slave - word
address register
Data
register
8bit
7bit
8bit
9bit
10bi
t
11bit
12bit
13b
it
START
STOP
ACK
*1
*1
1
2
3
4
8
7
6
5
SDA
SCL
WP
Vcc
A1
A0
A2
GND
*2
*2
*2
1
7bit : BR24A01A-WM
8bit : BR24A02-WM
9bit : BR24A04-WM
10bit : BR24A08-WM
11bit : BR24A16-WM
12bit : BR24A32-WM
13bit : BR24A64-WM
2 A0=N.C.
: BR24A04-WM
A0, A1=N.C.
: BR24A08-WM
A0, A1= N.C. A2=Don’t Use
: BR24A16-WM
1
2
3
4
8
6
5
BR24A01A-WM
BR24A02-WM
BR24A04-WM
BR24A08-WM
BR24A16-WM
BR24A32-WM
BR24A64-WM
A0
7
A1
A2
GND
Vcc
WP
SCL
SDA


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