C165UTAH Datasheet, PDF (376/539 Pages) Infineon Technologies AG – EMBEDDED C166 WITH USART IOM-2 AND HDLC SUPPORT

C165UTAH
IOM-2 Interface Controller
– RRES (Receiver Reset) command, resetting the HDLC receiver and clearing the
receive FIFO of any data (e.g. used before start of reception). It has to be used after
having changed the mode.
16.7.2.2 Possible Error Conditions during Reception of Frames
If parts of a frame get lost because the receive FIFO is full, the Receive Data Overflow
(RDO) byte in the STAR register will be set. In addition, the RFO interrupt will be set. If
a complete frame is lost the receiver will assert a Receive Frame Overflow (RFO)
interrupt or an Following Frame Overflow (FFO) interrupt, depending on the situation.
If the microcontroller reads data without a prior RME or RPF interrupt, the read data is
undefined.
16.7.2.3 Receive Frame Structure
The management of the received HDLC frames as affected by the different operating
modes is shown in Figure 130.
Data Sheet
376
2001-02-23