peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 51

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

.
Figure 2-1
2.1.2.3.5
– Synchronous transfer.
– 7-bit hardware timer.
– Frame length checking.
– Alternative input functions.
Semiconductor Group
This utility allows the synchronous µP-access to two independent channels on the
PCM- or CFI-interface. Interrupts are generated to indicate the appropriate access
windows.
The timer can be used to cyclically interrupt the CPU, to determine the double last look
period, to generate a proper CFI-multiframe synchronization signal or to generate a
defined RESIN pulse width.
The PFS-period is internally checked against the programmed frame length.
In PCM-mode 1 and 2, the unused ports can be used for redundancy purposes. In
these modes, for every active input port a second input port exists which can be
connected to a redundant PCM-line. Additionally the two lines are checked for
mismatches.
DU#
DD#
CFI
Special Functions
Upstream
Downstream
Control
Memory
(CM)
EPIC
®
-1 Memory Structure
127
0
DATA
8 Bits
CODE
4 Bits
127
Data Memory (DM)
0
Control
Memory
(CM)
DATA
8 Bits
2-5
127
0
DATA
8 Bits
µP
CODE
4 Bits
127
Functional Block Description
0
Data Memory (DM)
DATA
8 Bits
CODE
4 Bits
ITS05823
PEB 20560
TxD#
PCM
RxD#
2003-08