pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 56

• 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 (V110/X.30)
Normal operation, E, S, X change (indicated by the V.110-bit in the transmit descriptor)
Example for TRV = ‘11’
Note: 1. FNUM must be 0 for all transmit descriptors.
2. The actual E-, S-, X-bits have to be in the first transmit descriptor after reset.
3. As shown in the example the contiguous parts of a data section belonging to
4. The E-, S-, X-bits are only changed from one frame to the next not within a
5. Neither FE nor H may be set to 1 during a normal operation of the mode. They
one descriptor are sent in contiguous frames (DATA 1
DATA 1, DATA 1
is reached within a frame, the frame is continued with data from the next data
section belonging to a transmit descriptor with the bit V.110 = 0
(DATA 2
frame. The change occurs in the first frame which does not contain data of the
previous data section.
both lead to an abort of the serial interface.
(2)
= byte 4 of DATA 2, DATA 3
(2)
are the bytes 4 – 7 of DATA 1). If the end of a data section
56
(1)
= byte 0 – 2 of DATA 3).
Functional Description
(1)
are the bytes 0 – 3 of
PEB 20320
01.2000