pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 88

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

User’s Manual
For CS = 0 (CRC not select) the descriptor would have looked like
Figure 47
6. LFD is issued and always accompanied by NOB.
7. Here the ending flag of the second frame is the starting flag of the third frame.
8. After an abort sequence data is ignored until a flag is found (except for a
9. The last 3 bytes in the last write access to the receive data section of the 5th
10.The 2 flags with a shared 0 in the middle change the original interframe time-
11.The frame consisting only of 32 times 0 between 2 flags does not pass
12.The 15
13.This frame of length – 1 leads to an interrupt.
CRCO shouldn’t be interpreted for a LFD frame.
change of the interframe time-fill state). They are neither stored in the RB nor
reported to the shared memory.
descriptor have to be ignored.
fill state ‘0’ of the receiver to ‘F’. The 2 flags following FCS 5 on the other hand
do not change the interframe time-fill state, as it already was ‘F’.
check a). It only leads to an interrupt.
through it is in a data ignored zone.
‘1’ leads to a change of the interframe time-fill state from ‘F’ to ‘0’ even
31
C0071C00
1 Desc
20080000
st
0
1
Last Access of a LFD Frame
should be Ignored
31
C2
Generate
HI,
8800323D
A1
FI, ERR-Int.
01
03
31
0
3
200C0000
C0040000
88
rd
Desc
0
2
31
00 AC 49 FB
Generate HI,
8800303D
ITD04572
0
FI-Int.
Functional Description
PEB 20320
01.2000