PEF 20550 H V2.1 Infineon Technologies, PEF 20550 H V2.1 Datasheet - Page 73
PEF 20550 H V2.1
Manufacturer Part Number
PEF 20550 H V2.1
Description
IC INTERFACE CTRLR PCM MQFP80
Manufacturer
Infineon Technologies
Series
ELIC®r
Datasheet
1.PEF_20550_H_V2.1.pdf
(407 pages)
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
PEF20550HV21XP
SP000007794
SP000007795
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PEB 20550
PEF 20550
Functional Description
Extended Transparent Mode 0 (MODE:MDS1, MDS0, ADM = 110)
Characteristics: fully transparent without HDLC framing, any message length, any
window size.
Data is stored in register RAL1.
In extended transparent mode, fully transparent data transmission/reception without
HDLC-framing is performed, i.e. without FLAG-generation/recognition, CRC-generation/
check, bit stuffing mechanism. This allows user specific protocol variations or can be
used for test purposes (e.g. to generate frames with wrong CRC-words).
Data transmission is always performed out of the XFIFO. Data reception is done via
register RAL1, which contains the actual data byte assembled at the RxD pin.
Extended Transparent Mode 1 (MODE:MDS1, MDS0, ADM = 111)
Characteristics: fully transparent without HDLC-framing, any message length, any
window size. Data is stored in register RAL1 and RFIFO.
Identical behavior as extended transparent mode 0 but the received data is shifted
additionally into the RFIFO.
Receive Data Flow (summary)
The following figure gives an overview of the management of the received HDLC-frames
depending on the selected operating mode.
Semiconductor Group
73
01.96
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