PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 91
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PEB22554
Manufacturer Part Number
PEB22554
Description
ICs for Communications
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEB22554.pdf
(397 pages)
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Semiconductor Group
Figure 32
Interrupt Driven Transmission Example
4.1.3.2 HDLC Data Reception
Also 2
interrupt indications concerned with the reception of data:
RPF (Receive Pool Full) interrupt, indicating that a 32-byte-block of data can be read
from RFIFO and the received message is not yet complete.
RME (Receive Message End) interrupt, indicating that the reception of one message is
completed.
The following figure gives an example of a reception sequence, assuming that a “long”
frame (66 bytes) followed by two short frames (6 bytes each) are received.
Figure 33
Interrupt Driven Reception Sequence Example
FALC
System
Interface
CPU
Interface
R
32 byte FIFO buffers are provided in receive direction. There are different
32
Receive Frame 1 (66 bytes)
RPF
RD RFIFO
32 bytes
32
RMC
RPF
2
RF2 RF3
6
RD RFIFO
32 bytes
6
RMC
91
RME
RMC
RME
Operational Description E1
RMC
RME
PEB 22554
ITD10972
RMC
09.98
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