peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 413
peb20560
Manufacturer Part Number
peb20560
Description
Dsp Oriented Pbx Controller Doc
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20560.pdf
(433 pages)
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Semiconductor Group
9.1.2
The EPIC also supports the Monitor and Command/Indication (C/I) channels in
accordance with the IOM-2 interface protocol. The monitor handler controls the data flow
on the monitor channel either with or without an active handshake protocol. To reduce
the dynamic load of the µP, a 16-byte transmit/receive FIFO is provided.
The C/I handler supports different schemes:
In downstream direction the relevant content of the control memory (= Command) is
transmitted in the appropriate time-slot.
In upstream direction the C/I handler monitors the received data (= Indication). Upon a
change it generates an interrupt, stores the channel address in the 9-byte deep C/I-FIFO
and the actual C/I value in the control memory. Double last-look check is provided.
A 7-bit hardware timer can be used to interrupt the µP or DSP cyclically to determine the
double last-look period.
For more details please refer to IOM-2 Interface Reference Guide 3.91
9.1.3
Figure 9-2
FSC(I)
DCL(I)
ID I
ID O
Monitor and C/I Handlers
IOM
IOM
®
-2 Interface Timing
®
t
t
FS
DS
-2 Interface Timing with Single Data Rate DCL
IOM -2
lost Channels
(...,B*-Channel)
R
Frame n
t
FH
t
FWL
t
DDC
t
FS
IOM -2
first Channel
(B1,Channel,...)
R
t
FWH
Frame n+1
9-2
t
DH
t
DCL
PEB 20560
ITD06879
Appendix
2003-08
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