pef20320 Infineon Technologies Corporation, pef20320 Datasheet - Page 153

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

General Notes to Receive Commands:
1. After a pulse at the reset pin a channel having a time slot with RTI = 0 should be issued
2. When it is supposed to be used it should be issued a receive initialize command
3. To shut down a channel in receive direction one should first set it into the receive abort
4. Before changing the MODE, CRC, CS, TRV, INV, TFLAG bits of a channel or its RTI
5. To revive a channel after it has been shut down one should use the receive
6. To switch to a new starting point of a receive descriptor chain one should preferably
7. To issue channel commands not affecting the receive side one should issue
8. Combinations of the bits RI, RO, RA not in this description are reserved and are not
2. First Transmit Command Group
– transmit clear
– fast transmit abort
User’s Manual
aborted, the new descriptor (FRDA) is related to the next frame.
For V.110/X.30 and TMA data bits might get lost.
receive off commands until it is supposed to be used.
before using any other receive channel command.
condition for the time specified there and then set it into the receive off condition.
or time slot assignment or its fill/mask bits it should have been shut down. The bits
should be changed while issuing the receive off command.
initialization command.
use the receive jump command, only exceptionally the fast receive abort command
and never the receive initialize command.
allowed to be used.
TI = 0, TO = 0, TA = 0 (clears a previous transmit abort or transmit off condition, affects
only the serial interface)
• if the channel was never initialized by a transmit initialization command it has no
• if it was initialized previously it clears a transmit off or transmit abort condition set by
• if no transmit off or transmit abort condition is set it has no effect
TI = 0, TO = 0, TA = 1 (clears a previous transmit abort or transmit off condition, affects
only the DMA interface)
This abort is performed in the DMA controller and does not interfere with the current
transmission on the serial interface and the transfer between the TF and TB. If this
abort is detected the current descriptor is suspended and the frame or data transferred
to the TB is aborted. The next frame beginning in the transmit descriptor (FTDA)
defined in the channel specification of the CCS will be started immediately.
– a receive clear command if neither a receive off nor a receive abort condition is set
– a receive off command if a receive off condition is set
– a receive abort command if a receive abort condition is set.
effect
a previous channel command
153
Detailed Register Description
PEB 20320
01.2000