KD-LH70R
(No.49803)1-23
SECTION 4
Description of major ICs
4.1 BR24C01AFV-W-X (IC502) : EEPROM
• Pin layout
• Block diagram
• Pin function
*1 An open drain output requires a pull-up resister.
A0
A1
A2
GND
Vcc
WP
SCL
SDA
A0
A1
A2
GND
1
2
3
4
Vcc
WP
SCL
SDA
8
7
6
5
1kbit EEPROM ARRAY
7bit
ADDRESS
DECODER
SLAVE/WORD
ADDRESS REGISTER
7bit
8bit
DATA
REGISTER
CONTROL LOGIC
HIGH VOLTAGE GEN.
Vcc LEVEL DETECT
ACK
START
STOP
Description
Power supply
Ground (0v)
Slave address set
Serial clock input
Slave and word address, serial data input serial data output *1
Write protect input
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9
2
8
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2
9
8
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9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
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