XR17L152 Datasheet, PDF (48/55 Pages) Exar Corporation – 3.3V PCI BUS DUAL UART

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XR17L152
3.3V PCI BUS DUAL UART
REV. 1.1.0
FIGURE 16. PCI BUS CONFIGURATION SPACE REGISTERS READ AND WRITE OPERATION
CLK
Host
1
FRAME#
Host
2
3
4
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 /B E [3 :0]#
Host
CFG-W R
BYTE ENABLE#
IRDY#
Host
TRDY#
Target
DEVSEL#
Target
PCICFG _W R
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