w6691 Winbond Electronics Corp America, w6691 Datasheet - Page 43

• Manufacturer Part Number: w6691
• Description: Isdn S/t Interface Transceiver
• Manufacturer: Winbond Electronics Corp America

LAPB modulo 8 :
LAPB modulo 128 :
Control field bits
I frame
S frame
U frame
LAPD : modulo 128 only
Control field bits
I frame
S frame
U frame
(1 octet)
(1 octet)
(1 octet)
flag
flag
flag
address
address
(1octet)
(1octet)
(2 octets)
address
M
X
7
(1octet)
control
M
control
octets)
(1 or 2
7
M
X
6
(2 octets)
control
N(R)
N(R)
M
M
X
6
5
(0 or N octets)
information
N(S)
P/F
1st octet
X
4
M
5
(0 or N octets)
information
M
S
3
P/F
P/F
P
4
(0 or N octets)
information
M
S
2
M
S
3
43
(2 octets)
1
0
1
N(S)
FCS
M
S
2
0
0
1
1
(2 octets)
1
0
1
FCS
7
(1 octet)
flag
(2 octets)
0
0
1
1
FCS
6
Preliminary W6691
(1 octet)
Publication Release Date: Sep 2001
flag
5
N(R)
N(R)
2nd octet
(1 octet)
4
flag
3
2
Revision 1.1
1
P/F
P
0