MAX7300 Maxim, MAX7300 Datasheet - Page 16

• Manufacturer Part Number: MAX7300
• Description: The MAX7300 compact, serial-interfaced, I/O expansion peripheral provides microprocessors with up to 28 ports
• Manufacturer: Maxim

2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or
28-Port I/O Expander
Table 7. Configuration Register Format
Table 8. Shutdown Control (S Data Bit D0) Format
Table 9. Transition Detection Control (M Data Bit D7) Format
Table 10. Transition Detection Mask Register
16
* INT is automatically cleared after it is read.
Configuration Register
FUNCTION
Register
Normal Operation
______________________________________________________________________________________
Mask
FUNCTION
FUNCTION
FUNCTION
Shutdown
Disabled
Enabled
REGISTER
ADDRESS
(HEX)
0x06
ADDRESS CODE
ADDRESS CODE
ADDRESS CODE
WRITE
READ/
Read
Write
(HEX)
(HEX)
(HEX)
0x04
0x04
0x04
0x04
0x04
Unchanged
INT Status*
D7
D7
D7
D7
M
M
M
0
1
mask
Port
D6
30
D6
D6
D6
0
0
0
0
0
mask
Port
D5
29
D5
D5
D5
X
X
X
X
X
REGISTER DATA
REGISTER DATA
REGISTER DATA
REGISTER DATA
mask
Port
D4
28
D4
D4
D4
X
X
X
X
X
mask
Port
D3
27
D3
D3
D3
X
X
X
X
X
mask
Port
D2
D2
D2
D2
26
X
X
X
X
X
mask
D1
D1
D1
Port
D1
X
X
X
X
X
25
mask
Port
D0
D0
D0
D0
24
S
S
S
0
1