XR16C850_05 Datasheet, PDF (46/56 Pages) Exar Corporation – 2.97V TO 5.5V UART WITH 128-BYTE FIFO

XR16C850
2.97V TO 5.5V UART WITH 128-BYTE FIFO
FIGURE 19. DATA BUS READ TIMING IN INTEL BUS MODE WITH AS# TIED TO GND
xr
REV. 2.3.1
A0-A2
CS2#
CS0
CS1
IOR#
IOR
D0-D7
Valid Address
T_AS
T_CS
T_RDV
T_RD
Valid Data
T_AH
T_DY
T_DD
Valid Address
T_AS
T_CS
T_AH
T_RDV
T_RD
T_DD
Valid Data
Note: Only one chipselect and one read strobe should be used.
FIGURE 20. DATA BUS WRITE TIMING IN INTEL BUS MODE WITH AS# TIED TO GND
A0-A2
CS2#
CS1
CS0
IOW#
IOW
D0-D7
Valid Address
T_AS
T_CS
T_WR
T_AH
T_DY
T_DS2
Valid Data
T_DH2
Valid Address
T_AS
T_AH
T_CS
T_WR
T_DS2
Valid Data
T_DH2
Note: Only one chipselect and one write strobe should be used.
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