AM79C976 Advanced Micro Devices, AM79C976 Datasheet - Page 46
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AM79C976
Manufacturer Part Number
AM79C976
Description
PCnet-PRO 10/100 Mbps PCI Ethernet Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C976.pdf
(309 pages)
- Current page: 46 of 309
- Download datasheet (3Mb)
Figure 16 shows a target disconnect sequence during
which no data is transferred. STOP is asserted on clock
4 without TRDY being asserted at the same time. The
Am79C976 controller terminates the access with the
deassertion of FRAME on clock 5 and of IRDY one
46
DEVSEL
FRAME
TRDY
STOP
C/BE
IRDY
REQ
GNT
CLK
PAR
AD
1
DEVSEL is sampled
2
ADDR i
0111
3
P R E L I M I N A R Y
DATA
PAR
4
0000
Am79C976
DATA
5
PAR
clock cycle later. It finally releases the bus on clock 7.
The Am79C976 controller will again request the bus
after two clock cycles to retry the last transfer. The
starting address of the new transfer will be the address
of the last non-transferred data.
6
7
8
9
10
ADDR i +8
0111
11
22929B17
8/01/00
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