xr16m598 Exar Corporation, xr16m598 Datasheet - Page 16
xr16m598
Manufacturer Part Number
xr16m598
Description
1.62v To 3.63v High Performance Octal Uart With 16-byte Fifo
Manufacturer
Exar Corporation
Datasheet
1.XR16M598.pdf
(58 pages)
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XR16M598
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
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
•
•
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.
•
2.10.1
Select CTS (and RTS) or DSR (and DTR) through MCR bit-2.
Enable auto CTS/DSR flow control using EFR bit-7.
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.
Auto CTS/DSR Flow Control
Figure 9
):
16
REV. 1.0.0