pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 58

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

User’s Manual
Fixed Size Frame Oriented Protocols (V.110/X.30)
Handling of frame end (FE) indication
Note: 1. FNUM must be ‘0’ for all transmit descriptors.
2. The frame (E, S, X, DATA 2
3. Since y = 1,
4. For y = 10 DATA 2 is identical to DATA 2
5. The E-, S-, X-bits are supposed to be loaded by an earlier transmit descriptor
the octet no. y, containing the last data bit of DATA 2 to be sent.
peer station to recognize 3 consecutive 10-octet frames with frame error which
leads to a loss of synchronism in the peer station.
sent after frame (E, S, X, DATA 1
in the example. A descriptor changing them (with V.110-bit set) can be put
between, before or after the descriptors in the example. It will change these bits
according to the rules discussed previously.
, 10 the 20 + y times 00
(2)
) is the beginning of a 10-octet frame. It stops with
58
(2)
, DATA 2
H
characters sent afterwards cause the
(1)
(1)
and 30 times 00
).
Functional Description
H
characters are
PEB 20320
01.2000