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AM79C976 датащи(PDF) 109 Page - Advanced Micro Devices

номер детали AM79C976
подробное описание детали  PCnet-PRO??10/100 Mbps PCI Ethernet Controller
PDF  309 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM79C976 датащи(HTML) 109 Page - Advanced Micro Devices

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8/01/00
Am79C976
109
P R E L I M INARY
Table 23. Legal I/O Accesses in Word I/O Mode (DWIO = 0)
AD[4:0]
BE[3:0]
Type
Comment
0XX00
1110
RD
Byte read of APROM location 0h, 4h, 8h or Ch
0XX01
1101
RD
Byte read of APROM location 1h, 5h, 9h or Dh
0XX10
1011
RD
Byte read of APROM location 2h, 6h, Ah or Eh
0XX11
0111
RD
Byte read of APROM location 3h, 7h, Bh or Fh
0XX00
1100
RD
Word read of APROM locations 1h (MSB) and 0h (LSB), 5h and 4h, 8h and 9h or
Ch and Dh
0XX10
0011
RD
Word read of APROM locations 3h (MSB) and 2h (LSB), 7h and 6h, Bh and Ah or
Fh and Eh
10000
1100
RD
Word read of RDP
10010
0011
RD
Word read of RAP
10100
1100
RD
Word read of Reset Register
10110
0011
RD
Word read of BDP
0XX00
1100
WR
Word write to APROM locations 1h (MSB) and 0h (LSB), 5h and 4h, 8h and 9h or
Ch and Dh
0XX10
0011
WR
Word write to APROM locations 3h (MSB) and 2h (LSB), 7h and 6h, Bh and Ah or
Fh and Eh
10000
1100
WR
Word write to RDP
10010
0011
WR
Word write to RAP
10100
1100
WR
Word write to Reset Register
10110
0011
WR
Word write to BDP
10000
0000
WR
DWord write to RDP,
switches device to DWord I/O mode
Table 24. I/O Map In DWord I/O Mode (DWIO = 1)
Offset
No. of Bytes
Register
00h - 0Fh
16
APROM
10h
4
RDP
14h
4
RAP (shared by RDP and
BDP)
18h
4
Reset Register
1Ch
4
BDP
20h-1FFh
224
Memory-mapped Registers
200h-2FFh
256
MIB Counters
Table 25. Legal I/O Accesses in Double Word I/O
Mode (DWIO =1)
AD[4:0]
%([3:0]
Type
Comment
0XX00
0000
RD
DWord read of APROM
locations 3h (MSB) to 0h
(LSB),
7h to 4h, Bh to 8h or Fh to
Ch
0XX00
0000
WR
DWord write to APROM
locations 3h (MSB) to 0h
(LSB),
7h to 4h, Bh to 8h or Fh to
Ch
10000
0000
WR
DWord write to RDP
10100
0000
WR
DWord write to RAP
11000
0000
WR
DWord write to Reset
Register
10000
0000
RD
DWord read of RDP



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