UPD70F3786GJ-GAE-AX Datasheet, PDF (1498/1817 Pages) Renesas Technology Corp – RENESAS MCU V850ES/Jx3-E Microcontrollers

V850ES/JH3-E, V850ES/JJ3-E
CHAPTER 23 ETHERNET CONTROLLER
Table 23-8. Referencing the Hash Table (HT1, HT2)
CRC [28:26]
111b
110b
101b
100b
011b
010b
001b
000b
111b
HT1[31]
HT1[23]
HT1[15]
HT1[7]
HT2[31]
HT2[23]
HT2[15]
HT2[7]
110b
HT1[30]
HT1[22]
HT1[14]
HT1[6]
HT2[30]
HT2[22]
HT2[14]
HT2[6]
101b
HT1[29]
HT1[21]
HT1[13]
HT1[5]
HT2[29]
HT2[21]
HT2[13]
HT2[5]
CRC [25:23]
100b
011b
HT1[28] HT1[27]
HT1[20] HT1[19]
HT1[12] HT1[11]
HT1[4] HT1[3]
HT2[28] HT2[27]
HT2[20] HT2[19]
HT2[12] HT2[11]
HT2[4] HT2[3]
010b
HT1[26]
HT1[18]
HT1[10]
HT1[2]
HT2[26]
HT2[18]
HT2[10]
HT2[2]
001b
HT1[25]
HT1[17]
HT1[9]
HT1[1]
HT2[25]
HT2[17]
HT2[9]
HT2[1]
000b
HT1[24]
HT1[16]
HT1[8]
HT1[0]
HT2[24]
HT2[16]
HT2[8]
HT2[0]
An example of a program that executes hash table calculations is shown below.
Where DA = 12, 34, 56, 78, 9A, BC, for example, CRC = D4, E8, 80, 56, CRC[28:26] = 5, and CRC[25:23] = 1.
If HT1[9] in Table 23-8 is set, a multicast packet with the target DA is received. If the value of both the HT1 and
HT2 registers is 00000000H, all packets are discarded.
R01UH0290EJ0300 Rev.3.00
Sep 19, 2011
Page 1498 of 1817