PEF 2054 N V2.1 Infineon Technologies, PEF 2054 N V2.1 Datasheet - Page 185

• Manufacturer Part Number: PEF 2054 N V2.1
• Description: IC INTERFACE CTRLR PCM LCC-44
• Manufacturer: Infineon Technologies
• Series: EPICr

Specifications of PEF 2054 N V2.1

• Function: PCM Interface Controller
• Interface: ISDN, PCM
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 9.5mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-LCC
• Includes: Board Controller, Channel Switching
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEF2054NV2.1XT; PEF2054NV21XK; SP000057916; SP000075438

Table 31
CM Address
Even time slot downstream
Odd time slot downstream
Even time slot upstream
Odd time slot upstream
Example
In CFI mode 3, downstream time slots 2 and 3 and upstream time slots 6 and 7 of port
0 shall be initialized for 8 bit signaling channel handling:
W:MADR
W:MAAR
W:MACR
W:MADR
W:MAAR
W:MACR
W:MADR
W:MAAR
W:MACR
W:MADR
W:MAAR
W:MACR
8-Bit Signaling Scheme
This option is intended for SLD channels where the even time slot consists of an 8 bit
feature control channel and the odd time slot of an 8 bit signaling channel.
The feature control channel is handled by the MF handler according to the selected
protocol, handshake or non-handshake. Note that only the non-handshake mode makes
sense in SLD applications.
The 8 bit SIG channel can be accessed by the P for controlling codec filter devices. In
upstream direction each valid change in the SIG value is reported by interrupt to the P
and the CFI time slot address is stored in the CIFIFO (refer to chapter 5.5.2). The
change detection mechanism consists of a double last look logic with a programmable
period.
To initialize two consecutive CFI time slots for the 8 bit signaling channel scheme, the
CM codes as given in table 31 must be used:
Semiconductor Group
= 0100 0101
= 0001 0000
= 0111 1011
= XXXX XXXX
= 0001 0001
= 0111 1011
= 1101 0110
= 1011 0000
= 0111 1011
= 1101 0110
= 1011 0001
= 0111 1011
B
B
B
B
B
B
B
B
B
B
B
B
CM Code
1010
1011
1011
1011
; SIG value “0100 0101”
; downstream even TS, port 0 time slot 2
; write CM code + data fields, CM code “1011”
; don’t care
; downstream odd TS, port 0 time slot 3
; write CM code + data fields, CM code “1011”
; expected SIG value “1101 0110”
; upstream even TS, port 0 time slot 6
; write CM code + data fields, CM code “1011”
; expected SIG value “1101 0110”
; upstream odd TS, port 0 time slot 7
; write CM code + data fields, CM code “1011”
185
CM Data
SIG
XXXXXXXX
actual value
stable value
B
Application Hints
B
B
B
PEB 2055
PEF 2055