peb20550 Infineon Technologies Corporation, peb20550 Datasheet - Page 30

• Manufacturer Part Number: peb20550
• Description: Extended Pcm Interface Controller
• Manufacturer: Infineon Technologies Corporation

The CFI reads periodically the control memory and uses the extracted values as pointers
to write to the upstream (read from the downstream) data memory (random access). In
the case of C/I- or signaling channel applications the corresponding data is stored in the
control memory. In order to select the application of choice, the control memory provides
a code portion.
The control memory is accessible via the P-interface. In order to establish a connection
between CFI time slot A and PCM-interface time slot B, the B-pointer has to be loaded
into the control memory location A.
Figure 17
EPIC
Semiconductor Group
DU#
CFI
DD#
®
-1 Memory Structure
Upstream
Downstream
Control
Memory
(CM)
127
0
DATA
8 Bits
CODE
4 Bits
127
Data Memory (DM)
0
Control
Memory
(CM)
DATA
8 Bits
127
30
0
DATA
8 Bits
µP
CODE
4 Bits
127
0
Data Memory (DM)
DATA
8 Bits
Functional Description
CODE
4 Bits
ITS05823
PEB 2055
PEF 2055
TxD#
PCM
RxD#