am79c970 Advanced Micro Devices, am79c970 Datasheet - Page 32

• Manufacturer Part Number: am79c970
• Description: Pcnettm-pci Single-chip Ethernet Controller For Pci Local Bus
• Manufacturer: Advanced Micro Devices

Master Abort
The PCnet-PCI controller will terminate its cycle with a
Master Abort sequence if DEVSEL is not asserted within
4 clocks after FRAME is asserted. Master Abort is
treated as a fatal error by the PCnet-PCI controller. The
PCnet-PCI controller will reset all CSR and BCR loca-
tions to their H_RESET values. Any on-going network
DEVSEL
FRAME
TRDY
IRDY
C/BE
REQ
GNT
CLK
PAR
AD
1
DEVSEL is sampled by the PCnet-PCI controller.
2
3
ADDR
Figure 12. Master Abort
0111
P R E L I M I N A R Y
4
Am79C970
DATA
PAR
5
0000
activity will be stopped immediately. The PCI configura-
tion registers will not be cleared. RMABORT (bit 13) in
the Status register will be set to indicate that the PCnet-
PCI controller has terminated its transaction with a mas-
ter abort.
PAR
6
7
8
9
10
18220C-14
AMD
1-899