W89C940 Datasheet, PDF (38/61 Pages) Winbond – ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE)

W89C940
Transaction Termination
Disconnect-C/Retry Type
0
1
2
CLK
FRAME#
AD[31::0]
C/BE[3::0]#
ADDRESS
BUS CMD
IRDY#
TRDY#
DEVSEL#
3
4
15
16
17
T1
BE#'s
18
19
T3
STOP#
T2
SYMBOL
DESCRIPTION
MIN
TYP
MAX UNIT
T1
FRAME# deasserted from clock 15
0
T2
Clock 16 to STOP# asserted time
11
nsec
12
13 nsec
T3
Clock 18 to STOP# and DEVSEL#
11
hold time
12
13 nsec
Note: 1) The other timing requirements for PCI input signal are as the read transaction timing.
2) T1,T2 and T3 are used for the disconnect type C(host try to transfer more than one data
phase).
Target-Abort Type
0
1
2
3
4
5
6
7
CLK
T1
FRAME#
AD[31::0]
ADDRESS
C/BE[3::0]#
BUS CMD
BE#'s
8
9
IRDY#
TRDY#
DEVSEL#
STOP#
T2
T3
SYMBOL
DESCRIPTION
MIN
TYP
MAX UNIT
T1
FRAME# deasserted from clock 15
0
nsec
T2
Clock 4 to DEVSEL# hold time
11
12
13 nsec
T3
Clock 6 to STOP# hold time
11
12
13 nsec
Note: 1) The other timing requirements for PCI input signal are as the read transaction timing..
2) T2 and T3 are used for the target abort type(host addressing error).
Fast Back-to-Back Transactions
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