XR20M1172_09 Datasheet, PDF (44/58 Pages) Exar Corporation – TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO

XR20M1172
TWO CHANNEL I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.0.1
AC ELECTRICAL CHARACTERISTICS - UART CLOCK
Unless otherwise noted: TA=-40^o to +85^oC, Vcc=1.62 - 3.63V
SYMBOL
PARAMETER
XTAL1 UART Crystal Oscillator
LIMITS
1.8V ± 10%
MIN
MAX
LIMITS
2.5V ± 10%
MIN
MAX
LIMITS
3.3V ± 10%
MIN
MAX
24
24
24
UNIT
MHz
ECLK UART External Clock
32
50
64 MHz
T_ECLK External Clock Time Period
15
10
7
ns
FIGURE 20. CLOCK TIMING
T_ECLK
External
Clock
VIHCK
VILCK
T_ECH
T_ECL
44