XR16M2651 Datasheet, PDF (40/51 Pages) Exar Corporation – HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE

XR16M2651
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
AC ELECTRICAL CHARACTERISTICS
Unless otherwise noted: TA = -40^o to +85^oC, Vcc=1.62 - 3.63V, 70 pF load where applicable
REV. 1.0.2
SYMBOL
PARAMETER
T_SSI
T_RRI
T_SI
T_INT
T_WRI
T_SSR
T_RR
T_WT
T_SRT
T_RST
Bclk
Delay From Stop To Set Interrupt
Delay From IOR# To Reset Interrupt
Delay From Stop To Interrupt
Delay From Initial INT Reset To Transmit Start
Delay From IOW# To Reset Interrupt
Delay From Stop To Set RXRDY#
Delay From IOR# To Reset RXRDY#
Delay From IOW# To Set TXRDY#
Delay From Center of Start To Reset TXRDY#
Reset Pulse Width
Baud Clock
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
UNIT
1
1
1 Bclk
45
45
45 ns
45
45
45 ns
8
24
8
24
8
24 Bclk
45
45
45 ns
1
1
1 Bclk
45
45
45 ns
45
45
45 ns
8
8
8 Bclk
40
40
40
ns
16X or 8X or 4X of data rate
Hz
FIGURE 13. CLOCK TIMING
T_ECLK
VIH
External
Clock
VIL
T_ECH
T_ECL
40