pef82902 Infineon Technologies Corporation, pef82902 Datasheet - Page 115

• Manufacturer Part Number: pef82902
• Description: 4b3t Second Generation Modular Isdn Nt Intelligent Extended
• Manufacturer: Infineon Technologies Corporation

•
Figure 44
Figure 45
that a long frame (68 byte) followed by two short frames (12 byte each) are received. The
FIFO threshold (block size) is set to 32 bytes (EXMR.RFBS = ’00’) in this example:
• After 32 bytes have been received off frame 1 a RPF interrupt is generated to indicate
Data Sheet
that a data block can be read from the RFIFO.
gives an example of an interrupt controlled reception sequence, supposed
Data Reception Procedures
*
1)
In case of RME the last byte in RFIFO contains
the receive status information RSTA
N
Read Counter
RD_Count := RFBS
or
RD_Count := RBC
Read RD_Count
bytes from RFIFO
Change Block Size
Write EXMR.RFBS
(optional)
Receive Message
Complete
Write RMC
Message End
Pool Full
Receive
Receive
START
RME
RPF
?
?
N
Y
101
Y
*
1)
RBC = RBCH + RBCL register
RFBS: Refer to EXMR register
Read RBC
RD_Count := RBC
HDLC_Rflow.vsd
Functional Description
PEF 81902
2001-11-12