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数据搜索系统，热门电子元器件搜索 |
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KSZ8893FQL 数据表(PDF) 78 Page - Microchip Technology |
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KSZ8893FQL 数据表(HTML) 78 Page - Microchip Technology |
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78 / 109 page  2019 Microchip Technology Inc. DS00003038B-page 77 KSZ8893FQL 4.5 Advanced Control Registers (Registers 96-141) The IPv4/IPv6 Type of Service (TOS) Priority Control Registers implement a fully decoded, 128-bit Differentiated Ser- vices Code Point (DSCP) register set that is used to determine priority from the TOS field in the IP header. The most significant 6 bits of the TOS field are fully decoded into 64 possibilities, and the singular code that results is compared against the corresponding bits in the DSCP register to determine the priority. TABLE 4-10: ADVANCED CONTROL REGISTERS (REGISTERS 96-141) Bit Name R/W Description Default Register 96 (0x60): TOS Priority Control Register 0 7-6 DSCP[7:6] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x0C. 00 5-4 DSCP[5:4] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x08. 00 3-2 DSCP[3:2] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x04. 00 1-0 DSCP[1:0] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x00. 00 Register 97 (0x61): TOS Priority Control Register 1 7-6 DSCP[15:14] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x1C. 00 5-4 DSCP[13:12] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x18. 00 3-2 DSCP[11:10] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x14. 00 1-0 DSCP[9:8] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x10. 00 Register 98 (0x62): TOS Priority Control Register 2 7-6 DSCP[23:22] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x2C. 00 5-4 DSCP[21:20] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x28. 00 3-2 DSCP[19:18] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x24. 00 1-0 DSCP[17:16] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x20. 00 Register 99 (0x63): TOS Priority Control Register 3 7-6 DSCP[31:30] R/W The value in this field is used as the frame’s priority when bits [7:2] of the frame’s IP TOS/DiffServ/Traffic Class value is 0x3C. 00 |
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