XR16C864IQ-F Datasheet, PDF (45/51 Pages) Exar Corporation – 2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO

XR16C864
REV. 2.2.0
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
FIGURE 14. MODEM INPUT/OUTPUT TIMING FOR CHANNELS A-D
IO W #
IO W
RTS#
DTR#
A c tive
C h a n g e o f s ta te
T _{W DO}
C h a n g e o f s ta te
CD#
CTS#
DSR#
IN T
IO R #
R I#
T_MOD
C hang e of state
A c tive
A c tiv e
C h a n g e o f s ta te
T _RSI
T _MOD
A c tiv e
A c tive
A c tiv e
A c tiv e
T_MOD
C h a n g e o f s ta te
FIGURE 15. 16 MODE (INTEL) DATA BUS READ TIMING FOR CHANNELS A-D
A0-A7
T_AS
CS#
Valid Address
T_CS
T_RD
IOR#
D0-D7
T_RDV
Valid Data
T_AH
T_DY
T_DD
Valid Address
T_AS
T_CS
T_AH
T_RD
T_RDV
T_DD
Valid Data
RDTm
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