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AM79C970 bảng dữ liệu(PDF) 44 Page - Advanced Micro Devices

tên linh kiện AM79C970
Giải thích chi tiết về linh kiện  PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
PDF  168 Pages
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nhà sản xuất  AMD [Advanced Micro Devices]
Trang chủ  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C970 bảng dữ liệu(HTML) 44 Page - Advanced Micro Devices

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P R E L I M I N A R Y
AMD
1-911
Am79C970
Slave Configuration Transfers
The host can access the PCnet-PCI PCI configuration
space with a configuration read or write command. The
PCnet-PCI controller will assert
DEVSEL if the IDSEL
input is asserted during the address phase and if the ac-
cess is a configuration cycle.
DEVSEL is asserted two
clock cycles after the host has asserted
FRAME. All
configuration cycles are of fixed length. The PCnet-PCI
controller will assert
TRDY on the 3rd clock of the
data phase.
Slave Configuration Read
The Slave Configuration Read command is used by the
host CPU to read the configuration space in the PCnet-
PCI controller. This provides the host CPU with informa-
tion concerning the device and its capabilities. This is a
single cycle, non-burst 8-bit, 16-bit, or 32-bit transfer.
18220C-22
FRAME
CLK
AD
IRDY
TRDY
C/
BE
123456
ADDR
DATA
1010
BE's
PAR
PAR
PAR
DEVSEL
IDSEL
STOP
Figure 20. Slave Configuration Read



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