XR16M598 Datasheet, PDF (29/58 Pages) Exar Corporation – 1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO

REV. 1.0.0
XR16M598
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 16-BYTE FIFO
FIGURE 15. INTERRUPT OUTPUT IN ONE-SHOT AND RE-TRIGGERABLE MODES
Timer Started
Timer Timed
Out
TIMERCNTL
read
One-shot Mode
Re-triggerable
Mode
Timer Timed TIMERCNTL Timer Timed
Out
read
Out
3.1.3 8XMODE [7:0] (default 0x00)
Each bit selects sampling rate for that UART channel, for example, bit-0 is channel 0. This register associates
with 4XMODE register to decide the sampling rate (16X or 8X or 4X). When 4XMODE [7:0] = 0x00, Logic 0
(default) selects normal 16X sampling with logic one selects 8X sampling rate. Transmit and receive data rates
will double by selecting 8X. “Section 2.6, Programmable Baud Rate Generator with Fractional Divisor” on
page 9
8XMODE Register
Individual UART Channel 8X Clock Mode Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Ch-7 Ch-6 Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
3.1.4 4XMODE [7:0] (default 0x00)
Each bit selects sampling rate for that UART channel, for example, bit-0 is channel 0. This register associates
with 8XMODE register to decide the sampling rate (16X or 8X or 4X). When 8XMODE [7:0] = 0x00, Logic 0
(default) selects normal 16X sampling with logic 1 selects 4X sampling rate. Transmit and receive data rates
will quadruple by selecting 4X. “Section 2.6, Programmable Baud Rate Generator with Fractional Divisor”
on page 9
4XMODE Register
Individual UART Channel 8X Clock Mode Enable
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Ch-7 Ch-6 Ch-5 Ch-4 Ch-3 Ch-2 Ch-1 Ch-0
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