PEF 20550 H V2.1 Infineon Technologies, PEF 20550 H V2.1 Datasheet - Page 59

• 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

The status of the bit MODE:CFT (continuous frame transmission) defines whether a new
frame can be loaded as soon as the XFIFO is available or after the current transmission
was terminated.
Figure 33
XFIFO Loading, Continuous Frame Transmission Disabled (CFT = 0)
Figure 34
XFIFO Loading, Continuous Frame Transmission Enabled (CFT = 1)
When using the DMA-mode, prior to the data transfer the actual byte count to be
transmitted must be written to the registers XBCH, XBCL (transmit byte count high, low).
Semiconductor Group
Frame Preparation
Copy Data to Inaccessable
Frame Preparation
Copy Data to Inaccessable
Frame Transmission
Transmit Serial Data
Transmit Serial Data
Frame Transmission
XPR
XPR
XFIFO Part
XFIFO Part
Frame n
XPR
Frame n
XPR
(40 Bytes)
(40 Bytes)
Frame n
Frame n
XPR
59
Frame n+1
XPR
XPR
Frame n+1
Frame n+2
Frame n+1
(32 Bytes)
Functional Description
(32 Bytes)
Frame n+1
XPR
PEB 20550
PEF 20550
ITD05832
Frame n+2
XPR
ITD05831
01.96