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XR17V252 Datasheet, PDF (62/69 Pages) Exar Corporation – 66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT | |||
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XR17V252
66 MHZ PCI BUS DUAL UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.1
FIGURE 22. DEVICE CONFIGURATION REGISTERS, UART REGISTERS AND RECEIVE DATA BURST READ OPERATION
CLK
Host
1
FRAME#
Host
AD[31:0]
AD
Host Target
C/BE[3:0]# Bus
CMD
Host
IRDY#
Host
8
Data
Byte Enable# = DWORD
13
Data
18
Data
23
Data
TRDY#
Target
DEVSEL#
Target
PAR
AD
Data
Host
Target
PERR#
Target
Active
SERR#
Target
Active
Note: PERR# and SERR are optional in a bus target application.
Even Parity is on AD[31:0], C/BE[3:0]#, and PAR
Data
Active
Data
Active
Data
Active
PCI_BRD
62
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