W89C940 Datasheet, PDF (27/61 Pages) Winbond – ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE)

W89C940
CLK
1
2
3
4
5
6
7
8
FRAME#
AD[31::0]
C_BE[3:0]#
IRDY#
ADDRESS
BUS CMD
DATA
BE#'s
TRDY#
DEVSEL#
STOP#
PAR
Configuration Read Transaction
The Configuration Read timing is as shown
1
2
3
4
5
6
7
8
CLK
FRAME#
IDSEL
AD[31::0]
C_BE[3:0]#
IRDY#
TRDY#
DEVSEL#
STOP#
PAR
ADDRESS
BUS CMD
BE#'s
DATA
The timing is the same as the figure I/O Read Transaction, except the IDSEL is asserted during the address
phase. The transaction access the configuration registers of the device.
Configuration Write Transaction
The timing is as shown.
27