Datenblatt-Suchmaschine für elektronische Bauteile |
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TL16C752BLPTREP Datenblatt(PDF) 6 Page - Texas Instruments |
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TL16C752BLPTREP Datenblatt(HTML) 6 Page - Texas Instruments |
6 / 40 page Byte 0−7 Stop Start Byte 0−7 Stop Start TX CTS RX RTS IOR Start Byte N Stop Start Byte N+1 Stop Start 1 2 N N+1 TL16C752B-EP SGLS153B – FEBRUARY 2003 – REVISED DECEMBER 2007 www.ti.com A. N = receiver FIFO trigger level 2. B. The two blocks in dashed lines cover the case where an additional byte is sent as described in Auto-RTS. Figure 1. RTS Functional Timing Auto-CTS The transmitter circuitry checks CTS before sending the next data byte. When CTS is active, the transmitter sends the next byte. To stop the transmitter from sending the following byte. CTS must be deasserted before the middle of the last stop bit that is currently being sent. The auto-CTS function reduces interrupts to the host system. When flow control is enabled, the CTS state changes and need not trigger host interrupts because the device automatically controls its own transmitter. Without auto-CTS, the transmitter sends any data present in the transmit FIFO and a receiver overrun error can result. Figure 2 shows CTS functional timing, and Figure 3 shows an example of autoflow control. A. When CTS is low, the transmitter keeps sending serial data out B. When CTS goes high before the middle of the last stop bit of the current byte, the transmitter finishes sending the current byte but it does not send the next byte. C. When CTS goes from high to low, the transmitter begins sending data again. Figure 2. CTS Functional Timing 6 Submit Documentation Feedback Copyright © 2003–2007, Texas Instruments Incorporated Product Folder Links: TL16C752B-EP |
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