m62320gp Renesas Electronics Corporation., m62320gp Datasheet - Page 7

• Manufacturer Part Number: m62320gp
• Description: 8-bit I/o Expander For I2c Bus
• Manufacturer: Renesas Electronics Corporation.

M62320GP
Functional Description
All parallel data I/O terminals are set to the input-state after power-on. In case any terminals need to be set to the
output state, the corresponding terminals should be set during the write mode. This setting is hold until a next setting.
In the write mode, 8 bits data can be transmitted from the I
slave address and I/O setting.
In the read mode, 8 bits data can be transmitted from the parallel ports to the I
slave address setting.
In the case of a changing between the write-and read-mode, the data must be transmitted again from the starting
condition.
• In a case of a data conversion from serial to parallel.
• In a case of a data conversion from parallel to serial.
REJ03D0909-0100 Rev.1.00 Mar 25, 2008
Page 7 of 10
D0 to D7
output
D0 to D7
input
(example)
D0 to D7
output
D0
to
D7
SDA
SCL
SDA
SDA
SCL
SCL
All I/O setting resistors are set to low (input) in the write mode, before a parallel data is read. (All I/O setting
resistors are set to the input mode after power-on).
Start
condition
Start
condition
Start
condition
Hi-Z
Hi-Z
0
1
Hi-Z
0
1
0
1
Transmission from a master (MCU etc.)
Transmission from a slave (M62320)
1
Transmission from a master (MCU etc.)
Transmission from a slave (M62320)
2
1
2
1
2
Slave address
1
3
Slave address
1
Slave address
3
1
3
1
4
1
4
1
4
A2
5
A2
5
A2
5
A1 A0
6
A1 A0
6
A1 A0
6
D
7
7
1X
7
0
8
1
8
0
8
Data latch
A
A
A
P7
1
D17
1
P7
1
P6
2
D16
2
P6
2
P5 P4
I/O setting byte
3
D15 D14
3
P5 P4
I/O setting byte
3
4
DATA
4
4
P3
5
D13
5
D
P3
5
2X
P2 P1
6
D12
6
P2 P1
6
7
D11 D10
7
7
P0
8
8
P0 A
8
Data latch
A
A
2
C BUS interface to the parallel ports continually after the
D17
D37
D
3X
D16
D36
D15 D14
D35 D34
DATA
DATA
D13
D33
D12 D11
D32 D31
D
4X
2
C BUS interface continually after the
D10
D30
A
Data latch
A
Data output
D27
D47
D26
D46
D25 D24
D45 D44
DATA
D
DATA
1X
D23
D43
D22 D21
D42
D41 D40
D20
A
A
Data output
D
2X
Stop
condition
Stop
condition