XR16C2550 Datasheet, PDF (29/38 Pages) Exar Corporation – 2.97V TO 5.5V DUART WITH 16-BYTE FIFO

xr
REV. 1.0.1
FIGURE 16. DATA BUS WRITE TIMING
XR16C2550
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
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 17. 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
29