AM79C973BKD\W AMD (ADVANCED MICRO DEVICES), AM79C973BKD\W Datasheet - Page 111
AM79C973BKD\W
Manufacturer Part Number
AM79C973BKD\W
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.AM79C973BKDW.pdf
(304 pages)
Specifications of AM79C973BKD\W
Lead Free Status / RoHS Status
Compliant
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Table 22. I/O Map In DWord I/O Mode (DWIO =1)
00h - 0Fh
AD[4:0]
0XX00
0XX01
0XX10
0XX11
0XX00
0XX10
0XX00
0XX10
10000
10010
10100
10110
10000
10010
10100
10110
10000
Offset
1Ch
10h
14h
18h
No. of Bytes
BE[3:0]
1110
1101
1011
0111
1100
0011
1100
0011
1100
0011
1100
0011
1100
0011
1100
0011
0000
16
4
4
4
4
Table 21. Legal I/O Accesses in Word I/O Mode (DWIO = 0)
RAP (shared by RDP and
Type
WR
WR
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
RD
RD
RD
RD
RD
Reset Register
Register
APROM
BDP)
RDP
BDP
Byte read of APROM location 0h, 4h, 8h or Ch
Byte read of APROM location 1h, 5h, 9h or Dh
Byte read of APROM location 2h, 6h, Ah or Eh
Byte read of APROM location 3h, 7h, Bh or Fh
Word read of APROM locations 1h (MSB) and 0h (LSB), 5h and 4h, 8h and 9h or
Ch and Dh
Word read of APROM locations 3h (MSB) and 2h (LSB), 7h and 6h, Bh and Ah or
Fh and Eh
Word read of RDP
Word read of RAP
Word read of Reset Register
Word read of BDP
Word write to APROM locations 1h (MSB) and 0h (LSB), 5h and 4h, 8h and 9h or
Ch and Dh
Word write to APROM locations 3h (MSB) and 2h (LSB), 7h and 6h, Bh and Ah or
Fh and Eh
Word write to RDP
Word write to RAP
Word write to Reset Register
Word write to BDP
DWord write to RDP,
switches device to DWord I/O mode
P R E L I M I N A R Y
Am79C973/Am79C975
Table 23. Legal I/O Accesses in Double Word I/O
AD[4:0]
0XX00
0XX00
10000
10100
11000
10000
10100
11000
Comment
BE[3:0]
0000
0000
0000
0000
0000
0000
0000
0000
Mode (DWIO =1)
Type
WR
WR
WR
WR
RD
RD
RD
RD
DWord read of APROM
locations 3h (MSB) to 0h
(LSB),
7h to 4h, Bh to 8h or Fh to
Ch
DWord read of RDP
DWord read of RAP
DWord read of Reset
Register
DWord write to APROM
locations 3h (MSB) to 0h
(LSB),
7h to 4h, Bh to 8h or Fh to
Ch
DWord write to RDP
DWord write to RAP
DWord write to Reset
Register
Comment
111
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