MAX7317 Maxim, MAX7317 Datasheet - Page 6

• Manufacturer Part Number: MAX7317
• Description: The MAX7317 serial-interfaced peripheral provides microprocessors with 10 I/O ports rated to 7V
• Manufacturer: Maxim

10-Port SPI-Interfaced I/O Expander with
Overvoltage and Hot-Insertion Protection
Table 1. Register Address Map
Table 2. Initial Power-Up Register Status
6
Port P0 output level
Port P1 output level
Port P2 output level
Port P3 output level
Port P4 output level
Port P5 output level
Port P6 output level
Port P7 output level
Port P8 output level
Port P9 output level
Write ports P0 through P9 with same output level
Read port P0 output level
Write ports P0 through P3 with same output level
Read port P0 output level
Write ports P4 through P7 with same output level
Read port P4 output level
Write ports P8 or P9 with same output level
Read port P8 output level
Read ports P7 through P0 inputs
Read ports P9 and P8 inputs
RAM
No-op
Factory reserved; do not write to this register
Port P0 output level
Port P1 output level
Port P2 output level
Port P3 output level
Port P4 output level
Port P5 output level
Port P6 output level
Port P7 output level
Port P8 output level
Port P9 output level
RAM
_______________________________________________________________________________________
REGISTER
REGISTER
POWER-UP CONDITION
Port 0 high impedance
Port 1 high impedance
Port 2 high impedance
Port 3 high impedance
Port 4 high impedance
Port 5 high impedance
Port 6 high impedance
Port 7 high impedance
Port 8 high impedance
Port 9 high impedance
0x00
D15
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ADDRESS
0
1
0
1
0
1
0
1
1
1
CODE
(hex)
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x13
D14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
COMMAND ADDRESS
D13
D7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
D12
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
1
1
1
1
1
1
0
D11
D5
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
0
REGISTER DATA
D10
D4
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
D3
D9
1
1
1
1
1
1
1
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
1
0
0
D2
1
1
1
1
1
1
1
1
1
1
0
D8
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
D1
1
1
1
1
1
1
1
1
1
1
0
CODE
(hex)
0x0A
0x0B
0x0C
0x0D
0x7D
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0E
0x0F
0x13
0x20
D0
1
1
1
1
1
1
1
1
1
1
0