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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AM79C976 데이터시트(PDF) 238 Page - Advanced Micro Devices |
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AM79C976 데이터시트(HTML) 238 Page - Advanced Micro Devices |
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238 / 309 page  238 Am79C976 8/01/00 P R E L I M INARY Transmit Descriptors When SWSTYLE (BCR20, bits 7-0) is set to 0, the soft- ware structures are defined to be 16 bits wide, and transmit descriptors look like Table 110. When SWSTYLE is set to 2, the software structures are defined to be 32 bits wide, and transmit descriptors look like Table 111. When SWSTYLE is set to 3, then the software struc- tures are defined to be 32 bits wide, and transmit de- scriptors look like Table 112. When SWSTYLE is set to 4, then the software struc- tures are defined to be 32 bits wide, and transmit de- scriptors look like Table 113. When SWSTYLE is set to 5, then the software struc- tures are defined to be 32 bits wide, and transmit de- scriptors look like Table 114. Also when SWSTYLE is 5, the Am79C976 controller uses 64-bit addressing for software structures that are located above the 32-bit address boundary. 7DEOH 7UDQVPLW 'HVFULSWRU 6:67</( Offset 15 14 13 12 11 10 9 8 7-0 00h TBADR[15:0] 02h OWN ADD_ FCS LTINT STP ENP TBADR[23:16] 04h BCNT 06h Reserved 7DEOH 7UDQVPLW'HVFULSWRU 6:67</( Offset 31 30 29 28 27 26 25 24 23 22-16 15-12 11-4 3-0 00h TBADR[31:0] 04h OWN ADD_ FCS LTINT STP ENP BCNT 08h Reserved 0Ch USER SPACE 7DEOH 7UDQVPLW'HVFULSWRU 6:67</( Offset 31 30 29 28 27 26 25 24 23 22-16 15-0 00h Reserved 04h OWN ADD_ FCS LTINT STP ENP BCNT 08h TBADR[31:0] 0Ch USER SPACE 7DEOH7UDQVPLW'HVFULSWRU 6:67</( Offset 31 30 29 28 27-26 25 24 23 22 21-18 17-16 15-0 00h OWN ADD_ FCS LTINT STP ENP KILL BCNT 04h TCC[1:0] TCI[15:0] 08h TBADR[31:0] 0Ch USER SPACE |
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