XR16L2750 Datasheet, PDF (41/49 Pages) Exar Corporation – 2.25V TO 5.5V DUART WITH 64-BYTE FIFO

XR16L2750
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
REV. 1.0.0
FIGURE 17. DATA BUS WRITE TIMING
áç
A0-A2
CSA#/
CSB#
IOW#
D0-D7
Valid Address
T_AS
T_CS
T_WR
Valid Address
T_AH
T_AS
T_CS
T_AH
T_DY
T_WR
T_DS
T_DH
Valid Data
T_DS
T_DH
Valid Data
16Write
FIGURE 18. 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
41