peb20550 Infineon Technologies Corporation, peb20550 Datasheet - Page 165
peb20550
Manufacturer Part Number
peb20550
Description
Extended Pcm Interface Controller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20550.pdf
(269 pages)
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Upstream: CFI port 1, time slot 4, bits 7 … 0 to PCM port 0, time slot 5, bits 7 … 0
W:MADR
W:MAAR
W:MACR
The following sequence sets transmit time slot 5 of PCM port 0 to low impedance:
W:MADR
W:MAAR
W:MACR
After these three programming steps, the EPIC memories will have the following
contents:
Figure 59
Memory Content in Case of a PCM
Semiconductor Group
Up-
stream
Down-
stream
P1, TS4
P1, TS4
CFI
Frame
0
127
0
127
= 0000 1001
= 1001 0010
= 0111 0001
= 0000 1111
= 1000 1001
= 0110 0000
Code Field
0
0
0
0
0
0 0
1
Control Memory
B
B
B
B
B
B
0 0 0
0
0
PCM time slot encoding (pointer to “upstream” DM,
loop switch (MSB = 0) activated)
CFI time slot encoding (address of upstream CM)
CM code for switching a 64 kbit/s, bits 7 … 0
channel (0001)
all bits to low Z
PCM time slot encoding
MOC code to access the tristate field
Data Field
0
0
1
1
1
0 0 1
0
0
PCM Loop
1
165
Code Field
1 1 1 1
Data Memory
Data Field
Application Hints
P0, TS13
P0, TS5
PCM
Frame
PEB 2055
PEF 2055
0
127
0
127
Up-
stream
ITD08074
Down-
stream
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