MITSUBISHI < STD. LINEAR ICs >
M62320P,FP
8-BIT I/O EXPANDER for I C BUS
DIGITAL DATA FORMAT
1. Write mode : I
2
C BUS data input to Parallel data output
First
Last
2
S
SLAVE ADDRESS W
A
I/O SETTING
A
8BIT DATA A
8BIT DATA A
8BIT
DATA
A
P
2. Read mode :Parallel data input to I C BUS data output
First
Last
2
S
SLAVE ADDRESS W
A
8BIT DATA A
8BIT DATA A
8BIT DATA A
8BIT
DATA
A P
Transmission from Master (MCU etc.) to Slave (M62320)
Transmission from Slave (M62320) to Master (MCU etc.)
• S : Start Condition
While SCL level is high, SDA line level should be changed from high to low.
• Slave address
First
MSB
Last
LSB
• Chip select data
MSB
LSB
0
1
1
1
A2
A1
A0
A2
0
0
0
1
A1
0
0
1
1
A0
0
1
0
1
CS2
L
L
L
H
CS1 CS0
L
L
H
H
L
H
L
H
Lower three bits (A0,A1,A2) are a programmable address.
This IC is accessed only when the lower 3 bits data of slave
address coincide with the data of CS0 to CS2. (refer to the
right table)
• W: Write (SDA = LOW), R : Read (SDA = HIGH)
• A: Acknowledge bit
• I/O setting data (I/O setting of parallel data I/O terminals.)
First
MSB
Last
LSB
(L=Low,H=High)
P7
P6
P5
P4
P3
P2
P1
P0
• Each bit data corresponds to the I/O state of
the parallel data terminals.
DATA INPUT from parallel data terminals = Low
DATA OUTPUT to parallel data terminals = High
• 8bit data
First
MSB
Last
LSB
D7
D6
D5
D4
D3
D2
D1
D0
• P : Stop condition
While SCL level is high, SDA level should be changed from low to high.
2/20,1998(rev) ( 6 / 9 )
MITSUBISHI ELECTRIC
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
