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MAX7317 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX7317 Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 12 page 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection 6 _______________________________________________________________________________________ COMMAND ADDRESS REGISTER D15 D14 D13 D12 D11 D10 D9 D8 CODE (hex) Port P0 output level R/W 0 0 0 00 0 0 0x00 Port P1 output level R/W 0 0 0 00 0 1 0x01 Port P2 output level R/W 0 0 0 00 1 0 0x02 Port P3 output level R/W 0 0 0 00 1 1 0x03 Port P4 output level R/W 0 0 0 01 0 0 0x04 Port P5 output level R/W 0 0 0 01 0 1 0x05 Port P6 output level R/W 0 0 0 01 1 0 0x06 Port P7 output level R/W 0 0 0 01 1 1 0x07 Port P8 output level R/W 0 0 0 10 0 0 0x08 Port P9 output level R/W 0 0 0 10 0 1 0x09 Write ports P0 through P9 with same output level 0 Read port P0 output level 1 0 0 0 10 1 0 0x0A Write ports P0 through P3 with same output level 0 Read port P0 output level 1 0 0 0 10 1 1 0x0B Write ports P4 through P7 with same output level 0 Read port P4 output level 1 0 0 0 11 0 0 0x0C Write ports P8 or P9 with same output level 0 Read port P8 output level 1 0 0 0 11 0 1 0x0D Read ports P7 through P0 inputs 1 0 0 0 11 1 0 0x0E Read ports P9 and P8 inputs 1 0 0 0 11 1 1 0x0F RAM R/W 0 0 1 00 1 1 0x13 No-op R/W 0 1 0 00 0 0 0x20 Factory reserved; do not write to this register R/W 1 1 1 11 0 1 0x7D Table 1. Register Address Map REGISTER DATA REGISTER POWER-UP CONDITION ADDRESS CODE (hex) D7 D6 D5 D4 D3 D2 D1 D0 Port P0 output level Port 0 high impedance 0x00 1 1 11111 1 Port P1 output level Port 1 high impedance 0x01 1 1 11111 1 Port P2 output level Port 2 high impedance 0x02 1 1 11111 1 Port P3 output level Port 3 high impedance 0x03 1 1 11111 1 Port P4 output level Port 4 high impedance 0x04 1 1 11111 1 Port P5 output level Port 5 high impedance 0x05 1 1 11111 1 Port P6 output level Port 6 high impedance 0x06 1 1 11111 1 Port P7 output level Port 7 high impedance 0x07 1 1 11111 1 Port P8 output level Port 8 high impedance 0x08 1 1 11111 1 Port P9 output level Port 9 high impedance 0x09 1 1 11111 1 RAM 0x00 0x13 0 0 00000 0 Table 2. Initial Power-Up Register Status |
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