XR16M680 Datasheet, PDF (49/57 Pages) Exar Corporation – 1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO

XR16M680
REV. 1.0.0
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
FIGURE 21. 68 MODE (MOTOROLA) DATA BUS WRITE TIMING
A0-A2
CS#
R/W#
D0-D7
TADS
Valid Address
TCSL
TADH
TRWS
TCSD
TRWH
TWDS
T WDH
Valid Data
Valid Address
Valid Data
68Write
FIGURE 22. RECEIVE READY & INTERRUPT TIMING [NON-FIFO MODE]
RX
Start
Bit
D0:D7
Stop
Bit
D0:D7
T_SSR
T_SSR
1 Byte
1 Byte
INT
in RHR
in RHR
T_SSR
T_SSR
RXRDY#
Active
Data
Ready
T_RR
Active
Data
Ready
T_RR
IOR#
(Reading data
out of RHR)
D0:D7
T_SSR
1 Byte
in RHR
T_SSR
Active
Data
Ready
T_RR
RXNFM
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