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TLE8110EE Datasheet(PDF) 49 Page - Infineon Technologies AG |
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TLE8110EE Datasheet(HTML) 49 Page - Infineon Technologies AG |
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49 / 72 page  Data Sheet 49 Rev. 1.0, 2009-06-15 FLEX Smart Multi-Channel Switch Control of the device Figure 28 16-bit protocol 12.2.4 safeCOMMUNICATION The devise contains some safety features, which are improving the protecting of the application against mal- function in case of disturbance of the communication between the Micro Controller and the Device: 12.2.4.1 Encoding of the commands The Commands are encoded. In case other bit-patterns, then the defined once are received, the commands are ignored and the communication error is indicated in the TOR-Bit (see Chapter 12.2.4.3) and can be read out in detail with the command CMD_RSDS (seeChapter 12.3.1.2). 12.2.4.2 Modulo-8 Counter The modulo is the integral remainder in integral division. In data communications, a modulo based approach is used to ensure that user information in SPI protocols is in the correct order. The device has a receiver-side counter, and a defined counter size. The modulo counter specifies the number of subsequent numbers available. In case of TLE8110EE Modulo 8 counter specifies 8 serial numbers. The modulo 8 counter ensures that data is taken only, when a multiple of 8 bit has been transferred. If in one transfer cycle not a multiple of 8 bits have been counted, the data frame is ignored and a Communication Error is indicated in the TOR-Bit (see Chapter 12.2.4.3) and in the CMD_RSDS - Feedback (seeChapter 12.3.1.2). Upper Byte S_CS S_SI S_SO SPI_Protocol_16_2x8bit_mixed.vsd Lower Byte Upper Byte Lower Byte TOR CMD Upper Byte 0 TOR CMD Data TOR NOP Data TOR Upper Byte Lower Byte 0 Lower Byte TOR Upper Byte Lower Byte Upper Byte Lower Byte TOR Protocol Change from 2x8-bit to 16-bit Protocol Change from 16-bit to 2x8-bit Critical Protocol Change from 16-bit to 2x8-bit S_CS S_SI S_SO CMD Data TOR Upper Byte Lower Byte Data... Lower Byte TOR Upper Byte Lower Byte Upper Byte Lower Byte TOR S_CS S_SI S_SO collission 2x8-bit protocol is dominant |
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