beautypg.com

NEC Network Controller uPD98502 User Manual

Page 271

background image

CHAPTER 4 ATM CELL PROCESSOR

Preliminary User’s Manual S15543EJ1V0UM

271

(1) Rx VC table

Figure 4-32. Receive VC Table

Word 0 CLP BFA 0 RID DD DP 0

CI OD A/R MB

POOL No.

UINFO

31 30 29 28 27 26 25 24 23 22 21 20

16 15

0

Word 1

T1 TIME STAMP

MAX. No. OF BYTES

31

16 15

0

Word 2

REMAINING WORDS IN CURRENT BUFFER

CURRENT COUNT OF BYTES

31

16 15

0

Word 3

CRC-32 COUNT

31

0

Word 4

BUFFER WRITE ADDRESS

31

0

Word 5

CURRENT BUFFER ADDRESS

31

0

Word 6

PACKET START ADDRESS

31

0

Word 7

T1D

0

31

17 16 15

0

Word 8

RESERVED FOR ABR USE

31

0

Word 9

RESERVED FOR ABR USE

31

0

Word 10

RESERVED FOR ABR USE

31

0

Word 11

RESERVED FOR ABR USE

31

0

Word 12

RIF0

RDF0

0

ECI ENI

ER
e n b

EER

31

28 27

24 23

19 18 17 16 15

0

Word 13

RESERVED

31

0

Word 14

RESERVED

31

0

Word 15 0

BACKWARD POINTER

L S T

FORWARD POINTER

31 30

16 15 14

0

Fields which are defined by user