REV. 1.0.0 2.10.1 Auto CTS/DSR Flow Control Automatic CTS/DSR flow con" />
參數(shù)資料
型號(hào): XR16M698IQ-0B-EVB
廠商: Exar Corporation
文件頁(yè)數(shù): 8/58頁(yè)
文件大?。?/td> 0K
描述: EVAL BOARD FOR M698-B 100QFP
標(biāo)準(zhǔn)包裝: 1
系列: *
XR16M698
16
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
REV. 1.0.0
2.10.1
Auto CTS/DSR Flow Control
Automatic CTS/DSR flow control is used to prevent data overrun to the remote receiver FIFO. The CTS/DSR
pin is monitored to suspend/restart local transmitter. The flow control features are individually selected to fit
specific application requirement (see Figure 9):
Select CTS (and RTS) or DSR (and DTR) through MCR bit-2.
Enable auto CTS/DSR flow control using EFR bit-7.
With the Auto CTS or Auto DTR function enabled, the UART will suspend transmission as soon as the stop bit
of the character in the Transmit Shift Register has been shifted out. Transmission is resumed after the CTS#/
DTR# input is re-asserted (LOW), indicating more data may be sent.
If used, enable CTS/DSR interrupt through IER bit-7 (after setting EFR bit-4). The UART issues an interrupt
when the CTS#/DSR# pin makes a transition: ISR bit-5 will be set to a logic 1, and UART will suspend TX
transmissions as soon as the stop bit of the character in process is shifted out. Transmission is resumed
after the CTS#/DSR# input returns LOW, indicating more data may be sent.
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