COM20019 Datasheet, PDF (41/81 Pages) SMSC Corporation – Low Cost ARCNET (ANSI 878.1) Controller with 2K x 8 On-Board RAM

ADDRESS
0
1
2
COUNT
255
511
SHORT PACKET
FORMAT
SID
DID
COUNT = 256-N
NOT USED
DATA BYTE 1
DATA BYTE 2
DATA BYTE N-1
DATA BYTE N
NOT USED
ADDRESS
0
1
2
3
COUNT
511
LONG PACKET
FORMAT
SID
DID
0
COUNT = 512-N
NOT USED
DATA BYTE 1
DATA BYTE 2
DATA BYTE N-1
DATA BYTE N
N = DATA PACKET LENGTH
SID = SOURCE ID
DID = DESTINATION ID
(DID = 0 FOR BROADCASTS)
FIGURE 8 - RAM BUFFER PACKET CONFIGURATION
41
DISCONTINUED DATASHEET