XR17D154 Datasheet, PDF (58/69 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART

XR17D154
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
FIGURE 20. PCI BUS CONFIGURATION SPACE REGISTERS READ AND WRITE OPERATION
xr
REV. 1.2.0
CLK
Host
1
2
3
4
FRAME#
Host
AD[31:0]
Host
Target
ADDRESS
DATA
C/BE[3:0]#
Host
CFG-RD
BYTE ENABLE#
IRDY#
Host
TRDY#
Target
DEVSEL#
Target
PCICFG _RD
CLK
Host
1
2
3
4
FRAME#
Host
AD[31:0]
Host
Target
ADDRESS
W RITE DATA
C/BE[3:0]#
Host
CFG-W R
BYTE ENABLE#
IRDY#
Host
TRDY#
Target
DEVSEL#
Target
PCICFG _W R
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