AM79C970A Advanced Micro Devices, AM79C970A Datasheet - Page 37

• Manufacturer Part Number: AM79C970A
• Description: PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
• Manufacturer: Advanced Micro Devices

Disconnect Of Burst Transfer
The PCnet-PCI II controller does not support burst ac-
cess to the configuration space, the I/O resources, or to
the Expansion ROM. The host indicates a burst transac-
tion by keeping FRAME asserted during the data phase.
Figure 7. Disconnect Of Slave Burst Transfer—No Host Wait States
DEVSEL
FRAME
TRDY
STOP
IRDY
C/BE
PAR
CLK
AD
1
P R E L I M I N A R Y
1st DATA
Am79C970A
2
BE
PAR
When the PCnet-PCI II controller sees FRAME and
IRDY asserted in the clock cycle before it wants to as-
serts TRDY, it also asserts STOP at the same time. The
transfer of the first data phase is still successful, since
IRDY and TRDY are both asserted.
3
DATA
BE
4
PAR
5
19436A-10
AMD
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