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CAP1128 Datasheet(PDF) 17 Page - Microchip Technology |
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CAP1128 Datasheet(HTML) 17 Page - Microchip Technology |
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17 / 75 page  2015 Microchip Technology Inc. DS00001622B-page 17 CAP1128 4.6.2 SET ADDRESS POINTER The Set Address Pointer command sets the Address pointer for subsequent reads and writes of data. The pointer is set on the rising edge of the final data bit. At the same time, the data that is to be read is fetched and loaded into the internal output buffer but is not transmitted. 4.6.3 WRITE DATA The Write Data protocol updates the contents of the register referenced by the address pointer. As the command is pro- cessed, the data to be read is fetched and loaded into the internal output buffer but not transmitted. Then, the register is updated with the data to be written. Finally, the address pointer is incremented. FIGURE 4-4: SPI Reset Interface Command - Normal Mode FIGURE 4-5: SPI Set Address Pointer Command - Normal Mode Master SPDOUT SPI_MOSI SPI_CS# SPI_CLK Reset - 7Ah Reset - 7Ah Invalid register data 00h – Internal Data buffer empty SPI_MISO Master Drives Slave Drives ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘0’ ‘1’ ‘0’ ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘0’ ‘1’ ‘0’ Master SPDOUT SPI_MOSI Register Address SPI_CS# SPI_CLK Set Address Pointer – 7Dh Unknown, Invalid Data Unknown, Invalid Data SPI_MISO Master Drives Slave Drives Address pointer set ‘0’ ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ |
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