W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 67

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

Note : For the LAPD frame, the least significant two bits are the C/R bit and EA =0 bit. It is suggested that the
comparison with C/R bit be masked. EA=0 for two octet address frame e.g LAPD, EA=1 for one octet address
frame.
8.7.12 D_ch SAPI1 Register D_SAP1
Value after reset: 00H
SA12 is the SAPI value, SA11 is C/R bit and SA10 is zero.
8.7.13 D_ch SAPI2 Register
Value after reset: 00H
SA22 is the SAPI value, SA21 is C/R bit and SA20 is zero.
8.7.14 D_ch TEI Address Mask
Value after reset: 00H
TAM7
SA17
SA27
This register contains the first choice of the first byte address of received frame. For LAPD frame, SA17 -
This register contains the second choice of the first byte address of received frame. For LAPD frame, SA27 -
7
7
7
TAM6
SA16
SA26
6
6
6
TAM5
SA15
SA25
5
5
5
TAM4
SA14
SA24
4
4
4
TAM3
SA13
SA23
D_SAP2
D_TAM
3
3
3
Read/Write
TAM2
SA12
SA22
2
2
2
67
Read/Write
TAM1
SA11
SA21
1
1
1
Address 0FH
Read/Write
TAM0
SA10
SA20
0
0
0
Address 10H
Preliminary W6691
Publication Release Date: Sep 2001
Address 11H
Revision 1.1