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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9960 датащи(PDF) 80 Page - STMicroelectronics |
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L9960 датащи(HTML) 80 Page - STMicroelectronics |
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80 / 95 page  Functional description L9960, L9960T 80/95 DS11115 Rev 10 4.9.7 Communication check The purpose of this SPI communication self-check is to detect errors in the SPI communication from the µC. In case of no communication or of communication failure into the defined time frame, the bridge is put into tri-state. After the RESET state release, the communication check time-out timer Tcc is started by NDIS HIGH and DIS LOW from a pre-loaded value: If NDIS = '0' and DIS='1' when the RESET state is released, the pre-load is Tcc If NDIS='1' and DIS='0' when the RESET state is released, the pre-load is Tcc*2 for the first communication, Tcc for the next communications. In case the timer has expired (time-out), a status bit is registered CC_latch. Note: Available in D9 bit position in SPI answer frame 7e. The communication check can be disabled by SPI via dedicated bit Config_CC. Note: (-) available in D7 bit position in SPI answer frame 2. The status of config register is inverted in a status bit. Note: (-) available in the R10 bit position in SPI answer frame 7e. Table 93. CC_latch Bit config Description Condition 0 Communication Check Fail - 1 Communication Check Pass or Disable Default value Table 94. Config_CC Bit config Description Condition 0 Disable communication check - 1 enable communication check Reset value Table 95. Config_CC_state_echo7 Bit config Description Condition 0 echo communication check active Default value 1 echo communication check inactive - |
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