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CAP1166 Arkusz danych(PDF) 21 Page - Microchip Technology |
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CAP1166 Arkusz danych(HTML) 21 Page - Microchip Technology |
21 / 79 page 2015 Microchip Technology Inc. DS00001621B-page 21 CAP1166 4.7 Bi-Directional SPI Protocols 4.7.1 RESET INTERFACE Resets the Serial interface whenever two successive 7Ah codes are received. Regardless of the current phase of the transaction - command or data, the receipt of the successive reset commands resets the Serial communication interface only. All other functions are not affected by the reset operation. 4.7.2 SET ADDRESS POINTER Sets the address pointer to the register to be accessed by a read or write command. This command overrides the auto- incrementing of the address pointer. FIGURE 4-8: SPI Read Command - Normal Mode - Full FIGURE 4-9: SPI Reset Interface Command - Bi-directional Mode Master SPDOUT SPI_MOSI Master Drives Slave Drives SPI_CLK Read Command – 7Fh SPI_CS# Data at previously set register address = current address pointer SPI_MISO ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ Data at previously set register address = current address pointer (SPI) XXh 1. Register Read Address updated to Current SPI Read Address pointer 1. Register data loaded into output buffer = data at current address pointer 1. Output buffer transmitted = data at previous address pointer + 1 = current address pointer 1. Register Read Address incremented = current address pointer + 1 1. SPI Read Address Incremented = new current address pointer 2. Register Read Address Incremented = current address pointer +1 Register Data loaded into Output buffer = data at current address pointer + 1 1. Output buffer transmitted = data at current address pointer + 1 2. Flag set to increment SPI Read Address at end of next 8 clocks ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ Data at previously set register address = current address pointer (SPI) 1. Register data loaded into output buffer = data at current address pointer 1. Output buffer transmitted = data at previous register address pointer + 1 = current address pointer 1. Output buffer transmitted = data at current address pointer + 1 2. Flag set to increment SPI Read Address at end of next 8 clocks Subsequent Read Commands – 7Fh 1. Register Read Address updated to Current SPI Read Address pointer. 2. Register Read Address incremented = current address pointer +1 – end result = register address pointer doesn’t change Master SPDOUT SPI_MSIO SPI_CS# SPI_CLK Reset - 7Ah Reset - 7Ah ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘0’ ‘0’ ‘0’ ‘1’ ‘1’ ‘1’ ‘1’ ‘1’ ‘0’ ‘0’ ‘0’ |
Podobny numer części - CAP1166 |
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Podobny opis - CAP1166 |
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