pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 79

• Manufacturer Part Number: pef20320
• Description: Multichannel Network Interface Controller For Hdlc With 32 Channels
• Manufacturer: Infineon Technologies Corporation

Figure 41
Note: 1. Data is transmitted according to §2.8 of CCITT recommendation Q.921
User’s Manual
2. Note: FCS in the data section is formatted as ordinary data!!!
3. FCS is generated here automatically as CS = 0 and CSM = 0 for the
4. There was 1 zero insertion in the 1
1
Therefore between the first and the second frame we have
FLAG ITF FLAG and ITF = FFH because IFTF = 1.
st
01111110
Time Increases
.....
descriptor.
FLAG
31
FNUM=2
HOLD=0
01111110
A0010002
CSM=0
0101010100010100010111110
1 Desc
NO=1
FLAG
st
FE=1
HI=1
8 Zero Insertion
111110111110111110111110111110111110111110111110
0
0
01010101 00010100010111110 01111110 11111111
DATA
31
DATA 3
Generate FI, HI-Int.
2000181A
1
1
AA
31
0
Zero Insertion
FNUM=1
80060801
HOLD=0
2
CSM=1
nd
NO=6
FE=1
HI=0
Desc
FCS
DATA 2
01111110
0
FLAG
0
2
Zero Insertion
79
31
FF
Generate FI-Int.
2000081A
FF
st
FF
00
FLAG
frame, so FNUM –
FF
FF
FNUM=0
HOLD=0
31
0
CSM=1
80030800
NO=3
3 Desc
FE=1
HI=0
rd
Address
Increases
ITF
0
0
4
00000000
Functional Description
3
31
Generate FI-Int.
2000081A
FA 28
01111110
FLAG
AA
ITD04578
1
-- -
8
0
= FNUM = 2.
PEB 20320
5
01.2000