XR17C152 Datasheet, PDF (52/62 Pages) Exar Corporation – 5V PCI BUS DUAL UART

XR17C152
5V PCI BUS DUAL UART
FIGURE 17. PCI BUS CONFIGURATION SPACE REGISTERS READ AND WRITE OPERATION
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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
FRAME#
Host
2
3
4
AD[31:0]
Host
Target
ADDRESS
W RITE DATA
C /B E [3 :0]#
Host
CFG-W R
BYTE ENABLE#
IRDY#
Host
TRDY#
Target
DEVSEL#
Target
PCICFG _W R
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