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ATA5728C Datasheet(PDF) 11 Page - ATMEL Corporation |
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ATA5728C Datasheet(HTML) 11 Page - ATMEL Corporation |
11 / 44 page 11 ATA5723C/ATA5724C/ATA5728C [DATASHEET] 9248D–RKE–10/14 Figure 8-1. Polling Mode Flow Chart 8.2 Bit-check Mode In bit-check mode the incoming data stream is examined to distinguish between a valid signal from a corresponding transmitter and signals due to noise. This is done by subsequent time frame checks where the distances between 2 signal edges are continuously compared to a programmable time window. The maximum number of these edge-to-edge tests, before the receiver switches to receiving mode, is also programmable. 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 TBit-check IS = ISon Start-up Mode: The signal processing circuits are enabled. After the start-up time (TStartup) all circuits are in stable condition and ready to receive. Output level on Pin IC_ACTIVE = > high TStartup IS = ISon 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 Polling/_ON. Output level on Pin IC_ACTIVE = > high IS = ISon Sleep Mode: All circuits for signal processing are disabled. Only XTO and Polling logic are enabled. Output level on Pin IC_ACTIVE = > low TSleep = Sleep x XSleep x 1024 x TClk IS = ISoff Bit Check OK ? 5-bit word defined by Sleep 0 to Sleep 4 in OPMODE register Sleep: Is defined by the selected baud rate range and TClk. The baud-rate range is defined by Baud 0 and Baud 1 in the OPMODE register. TStartup: Basic clock cycle defined by fXTO and Pin MODE TClk: If the bit check fails, the average time period for that check depends on the selected baud-rate range and on TClk. The baud-rate range is defined by Baud 0 and Baud 1 in the OPMODE register. If the bit check is ok, TBit-check depends on the number of bits to be checked (NBit-check) and on the data rate used. Depends on the result of the bit check TBit-check: Extension factor defined by XSleepStd according to Table 11-8 XSleep: OFF Command YES NO |
Similar Part No. - ATA5728C_14 |
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Similar Description - ATA5728C_14 |
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