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| XR16C850CM-F Datasheet, PDF (47/56 Pages) Exar Corporation – 2.97V TO 5.5V UART WITH 128-BYTE FIFO | |||
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REV. 2.3.1
XR16C850
2.97V TO 5.5V UART WITH 128-BYTE FIFO
FIGURE 21. DATA BUS READ TIMING IN INTEL BUS MODE USING AS#
AS#
TAS1
A0-A2
CS2#
CS0 or CS1
TCS1
IOR#
IOR
DDIS#
TASW
TAH1
Valid Address
TCS
TCSH
TRD1
TRD
TDIS
D0-D7
TRDV
Valid Data
TAS2
TCS2
TDY
TASW
TAH2
Valid Address
TCS
TCSH
TRD2
TRD
TDIS
TDD
TRDV
TDD
Valid Data
Note: Only one chipselect and one read strobe should be used.
FIGURE 22. DATA BUS WRITE TIMING IN INTEL BUS MODE USING AS#
AS#
TAS1
TASW
TAH1
A0-A2
CS2#
CS0 or CS1
IOW#
IOW
TCS1
Valid Address
TCSH
TCS
TWR1
TWR
TDS2
D0-D7
Valid Data
TAS2
TCS1
TDY
TDH2
Note: Only one chipselect and one write strobe should be used.
TASW
TAH1
Valid Address
TCSH
TCS
TWR1
TWR
TDS2
TDH2
Valid Data
47
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