PEF 20550 H V2.1 Infineon Technologies, PEF 20550 H V2.1 Datasheet - Page 320

• Manufacturer Part Number: PEF 20550 H V2.1
• Description: IC INTERFACE CTRLR PCM MQFP80
• Manufacturer: Infineon Technologies
• Series: ELIC®r

Specifications of PEF 20550 H V2.1

• Function: Line Card Controller
• Interface: ISDN, PCM
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 15mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-SQFP
• Includes: Change Detection, Power-Up Reset Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEF20550HV2.1XT; PEF20550HV21XP; SP000007794; SP000007795

Figure 110
The value written to the downstream CM data field location is transmitted repeatedly in
every frame (CFI idle value) during the corresponding downstream CFI timeslot until a
new value is loaded or the ‘ P channel’ function is disabled. There are no interrupts
generated.
The upstream CM data field can be read at any time. The CM data field is updated in
every frame. The last value read represents the value received. There are no interrupts
generated.
For frame-synchronous exchange of data between the P and the CFI, the synchronous
transfer utility must be used (refer to chapter 5.7). Since this utility realizes the data
Semiconductor Group
P Access to the Upstream CFI Frame
MACR:
Up-
stream
1 1 0 0 1 0 0 0
CFI
Frame
0
127
1
Code Field
0
0
1
Control Memory
MADR:
Data Field
320
MAAR:
1
MA6
Application Hints
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PEB 20550
PEF 20550
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ITD08090
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01.96