SMSC COM20020 FIGURE 8 - RAM BUFFER PACKET CONFIGURATION

34
SID
DID
COUNT = 256-N
NOT USED
DATA BYTE 1
DATA BYTE 2
DATA BYTE N-1
DATA BYTE N
NOT USED
SID
DID
0
COUNT = 512-N
NOT USED
DATA BYTE 1
DATA BYTE 2
DATA BYTE N-1
DATA BYTE N
SHORT PACKET
FORMAT
LONG PACKET
FORMAT
ADDRESS ADDRESS
0
1
2
COUNT
255
511
N = DATA PACKET LENGTH
SID = SOURCE ID
DID = DESTINATION ID
(DID = 0 FOR BROADCASTS)
0
1
2
COUNT
511
3
FIGURE 8 - RAM BUFFER PACKET CONFIGURATION