XR17D158IV-F Datasheet, PDF (62/73 Pages) Exar Corporation – UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART

XR17D158
UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART
FIGURE 20. PCI BUS CONFIGURATION SPACE REGISTERS READ AND WRITE OPERATION
xr
REV. 1.2.2
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
WRITE DATA
C/BE[3:0]#
Host
CFG-WR
BYTE ENABLE#
IRDY#
Host
TRDY#
Target
DEVSEL#
Target
PCICFG_WR
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