XR16L2551_07 Datasheet, PDF (41/49 Pages) Exar Corporation – LOW VOLTAGE DUART WITH POWERSAVE

REV. 1.1.3
XR16L2551
LOW VOLTAGE DUART WITH POWERSAVE
FIGURE 19. 68 MODE (MOTOROLA) DATA BUS WRITE TIMING
A0-A3
CS#
R/W#
D0-D7
TADS
Valid
Address
TCSL
TADH
TRWS
TCSD
TRWH
TWDS
Valid
Data
T WDH
Valid
Address
Valid
Data
68Write
FIGURE 20. RECEIVE READY & INTERRUPT TIMING [NON-FIFO MODE] FOR CHANNELS A & B
RX
Start
Bit
D0:D7
Stop
Bit
D0:D7
D0:D7
T_SSR
T_SSR
T_SSR
1 Byte
1 Byte
1 Byte
INT
in RHR
in RHR
in RHR
T_SSR
T_SSR
T_SSR
RXRDY#
Active
Data
Ready
T_RR
Active
Data
Ready
T_RR
Active
Data
Ready
T_RR
IOR#
(Reading data
out of RHR)
RXNFM
41