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ATA5761 Datasheet(PDF) 11 Page - ATMEL Corporation |
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ATA5761 Datasheet(HTML) 11 Page - ATMEL Corporation |
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11 / 41 page  11 4896D–RKE–08/08 ATA5760/ATA5761 Figure 8-1. Polling Mode Flow Chart Figure 8-2. Timing Diagram for Complete Successful Bit Check Sleep mode: All circuits for signal processing are disabled. Only XTO and Polling logic is enabled. Output level on Pin IC_ACTIVE => low I S = ISoff T Sleep = Sleep x XSleep x 1024 x TClk Start-up mode: The signal processing circuits are enabled. After the start-up time (T Startup) all circuits are in stable condition and ready to receive. Output level on Pin IC_ACTIVE => high I S = ISon T Startup Bit-check mode: The incoming data stream is analyzed. If the timing indicates a valid transmitter signal, the receiver is set to receiving mode. Otherwise it is set to Sleep mode. Output level on Pin IC_ACTIVE => high I S = ISon T Bit-check Receiving mode: The receiver is turned on permanently and passes the data stream to the connected microcontroller. It can be set to Sleep mode through an OFF command via Pin DATA or Output level on Pin IC_ACTIVE => high I S = ISon Bit check OK ? OFF command Sleep: 5-bit word defined by Sleep0 to Sleep4 in OPMODE register X Sleep:Extension factor defined by XSleepStd according to Table 9 T Clk:Basic clock cycle defined by fXTO and Pin MODE T Startup:Is defined by the selected baud rate range and TClk. The baud-rate range is defined by Baud0 and Baud1 in the OPMODE register. NO YES POLLING/_ON. T Bit-check : Depends on the result of the bit check If the bit check is ok, T Bit-check depends on the number of bits to be checked (N Bit-check) and on the utilized data rate. If the bit check fails, the average time period for that check depends on the selected baud-rate range and on T Clk. The baud-rate range is defined by Baud0 and Baud1 in the OPMODE register. Bit check IC_ACTIVE Data_out (DATA) 1/2 Bit Start-up mode (Number of checked Bits: 3) Bit check ok 1/2 Bit 1/2 Bit 1/2 Bit 1/2 Bit 1/2 Bit Receiving mode Dem_out Bit-check mode T Start-up T Bit-check |
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