XR16L2751 Datasheet, PDF (42/52 Pages) Exar Corporation – 2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE

áç
XR16L2751
2.25V TO 5.5V DUART WITH 64-BYTE FIFO AND POWERSAVE
REV. 1.0.0
AC ELECTRICAL CHARACTERISTICS
TA=0^O TO 70^OC (-40^O TO +85^OC FOR INDUSTRIAL GRADE PACKAGE), VCC IS 2.5- 5.0V +/-10%
SYMBOL
PARAMETER
T_RSI Delay To Reset Interrupt From
IOR#
LIMITS
2.5
MIN
MAX
LIMITS
3.3
MIN
MAX
LIMITS
5.0
MIN
MAX
UNIT
CONDITIONS
50
40
35 ns 100 pF load
T_SSI Delay From Stop To Set Inter-
1
1
1 Bclk
rupt
T_RRI
Delay From IOR# To Reset
Interrupt
50
45
40 ns 100 pF load
T_SI Delay From Stop To Interrupt
50
45
40 ns
T_INT Delay From Initial INT Reset To
8
24
8
24
8
24 Bclk
Transmit Start
T_WRI Delay From IOW# To Reset
Interrupt
50
45
40 ns
T_SSR Delay From Stop To Set
RXRDY#
1
1
1 Bclk
T_RR Delay From IOR# To Reset
RXRDY#
50
45
40 ns
T_WT Delay From IOW# To Set
TXRDY#
50
45
40 ns
T_SRT Delay From Center of Start To
8
8
8 Bclk
Reset TXRDY#
T_RST
N
Reset Pulse Width
Baud Rate Divisor
40
40
40
ns
1
2¹⁶-1
1
2¹⁶-1
1
2¹⁶-1 ^-
Bclk Baud Clock
16X or 8X of data rate
Hz
FIGURE 14. CLOCK TIMING
EXTERNAL
CLOCK
CLK
CLK
OSC
42