Rainbow Electronics BR24C21FV - Manual (Page 2)

BR24C21 / BR24C21F / BR24C21FJ / BR24C21FV
Memory ICs
! ! ! ! Block diagram
1 N.C.
N.C. 2
N.C. 3
GND 4
V CC 8
VCLK 7
6 SCL
SDA 5
1kbits EEPROM array
Control logic
High voltage generator Vcc level detecter
7bits 8bits
ACK
STOP START
Address
decoder Slave word
address register
7bits
Data
register
! ! ! ! Pin assignment
BR24C21
BR24C21F
BR24C21FJ
BR24C21FV
V CC
N.C.
VCLK
N.C.
SCL
N.C.
SDA
GND
1 2 3 4
5 6 7 8
! ! ! ! Pin descriptions
5
6 Serial clock input for Bi-directional Mode
7
8
1 No connection
4
I / O Pin No.
SCL
N.C.
GND
Pin name Function
−
2 No connection N.C. −
3 No connection N.C. −
Power supply V CC
−
−
I
Clock input (Transmit-Only Mode)
Write enable (Bi-directional Mode)
VCLK I
Ground (0V)
SDA I / O
Slave and word address,
serial data input, serial data output
∗ An open drain output requires a pull-up resistor.
∗