XR16M2551 Datasheet, PDF (43/51 Pages) Exar Corporation – HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE

XR16M2551
REV. 1.0.2
HIGH PERFORMANCE LOW VOLTAGE DUART WITH 16-BYTE FIFO AND POWERSAVE FEATURE
FIGURE 18. 68 MODE (MOTOROLA) DATA BUS WRITE TIMING
A0-A3
CS#
R/W#
D0-D7
TADS
Valid Address
TCSL
T ADH
T RWS
T CSD
T RWH
T WDS
Valid Data
T WDH
Valid Address
Valid Data
68Write
FIGURE 19. RECEIVE READY & INTERRUPT TIMING [NON-FIFO MODE] FOR CHANNELS A & B
RX
INT
RXRDY#
Start
Bit
D0:D7
Stop
Bit
T_SSR
1 Byte
in RHR
T_SSR
Active
Data
Ready
T_RR
D0:D7
T_SSR
1 Byte
in RHR
T_SSR
Active
Data
Ready
T_RR
D0:D7
T_SSR
1 Byte
in RHR
T_SSR
Active
Data
Ready
T_RR
IOR#
(Reading data
out of RHR)
RXNFM
43