XR16V654_0709 Datasheet, PDF (45/58 Pages) Exar Corporation – 2.25V TO 3.6V QUAD UART WITH 64-BYTE FIFO

XR16V654/654D
REV. 1.0.2
2.25V TO 3.6V QUAD UART WITH 64-BYTE FIFO
FIGURE 16. MODEM INPUT/OUTPUT TIMING FOR CHANNELS A-D
IO W #
IO W
RTS#
DTR#
A c tiv e
C h an ge o f state
T _{W DO}
C h a n g e o f sta te
CD#
CTS#
DSR#
IN T
IO R #
R I#
T _MOD
C h a n g e o f sta te
A c tive
A c tiv e
C ha n ge o f state
T _RSI
T _MOD
A c tiv e
A c tiv e
A c tiv e
A c tive
T_MOD
C ha n ge o f state
FIGURE 17. 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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