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MAX7317 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX7317 Datasheet(HTML) 7 Page - Maxim Integrated Products |
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7 / 12 page  Connecting Multiple MAX7317s to the 4-Wire Bus Multiple MAX7317s can be interfaced to a common SPI bus by connecting DIN inputs together, SCLK inputs together, and providing an individual CS per the MAX7317 device (Figure 2). This connection works regardless of the configuration of DOUT/OSC, but does not allow the MAX7317s to be read. 10-Port SPI-Interfaced I/O Expander with Overvoltage and Hot-Insertion Protection _______________________________________________________________________________________ 7 REGISTER DATA REGISTER R/W ADDRESS CODE (hex) D7 D6 D5 D4 D3 D2 D1 D0 Read input ports P7–P0 1 0X0E Port P7 Port P6 Port P5 Port P4 Port P3 Port P2 Port P1 Port P0 Read input ports P9, P8 1 0X0F 0 0 0 0 0 0 Port P9 Port P8 Table 3. Input Ports Register REGISTER DATA BINARY REGISTER R/W ADDRESS CODE (hex) D7 D6 D5 D4 D3 D2 D1 D0 hex Port P0 level — MSB Output P0 level and PWM LSB Port P0 is open-drain logic low — 000000 0 0 0x00 Port P0 is open-drain logic high (high impedance without external pullup) or logic input — 0x00 000000 0 1 0x01 Port P1 level — 0x01 MSB Port P1 level LSB Port P2 level — 0x02 MSB Port P2 level LSB Port P3 level — 0x03 MSB Port P3 level LSB Port P4 level —- 0x04 MSB Port P4 level LSB Port P5 level — 0x05 MSB Port P5 level LSB 0x00 or 0x01 Port P6 level — 0x06 MSB Port P6 level LSB Port P7 level — 0x07 MSB Port P7 level LSB Port P8 level — 0x08 MSB Port P8 level LSB Port P9 level — 0x09 MSB Port P9 level LSB Writes ports P0 through P9 with same level 0 MSB Ports P0 through P9 level LSB Reads port P0 level 1 0x0A MSB Port P0 level LSB Writes ports P0 through P3 with same level 0 MSB Ports P0 through P3 level LSB Reads port P0 level 1 0x0B MSB Port P0 level LSB Writes ports P4 through P7 with same level 0 MSB Ports P4 through P7 level LSB Reads port P4 level 1 0x0C MSB Port P4 level LSB Write ports P8 and P9 with same level 0 MSB Ports P8, P9 level LSB Read port P8 level 1 0x0D MSB Port P8 level LSB Table 4. Output Registers Format |
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Similar Description - MAX7317 |
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