1-34 (No.49793)
4.3
BR24C32F (IC703) : EEPROM
• Pin Layout
• Pin layout & Block diagram
• Pin function
4.4
HD74HC126FP (IC771) : Changer Control
SDA
SCL
WP
BR24C32/F
VCC
GND
A2
A1
A0
PIN NAME
I/O
Function
VCC
-
Power Supply
GND
-
Ground (0V)
A0-A2
I
Slave Address Set
SCL
I
Serial Clock Input
SDA
I/O Slave and Word Address.
Serial Data Input$ Serial Data Output *1
WP
I
Write Protect Input
1
2
3
4
8
7
6
5
Vcc
WP
SCL
SDA
A0
A1
A2
GND
32 Kbit EEPROM ARRAY
8bit
12bit
12bit
DATA
REGISTER
SLAVE WORD
ADDRESS REGISTER
ADDRESS
DECODER
START
STOP
CONTROL LOGIC
VCC LEVEL DETECT
HIGH VOLTAGE GEN.
ACK
1
6
7
14
13
12
11
10
9
8
OE1
Y2
Vss
Vcc
OE4
A4
Y4
OE3
A3
Y3
HD74HC126
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