PEB20256EV21GXP Infineon Technologies, PEB20256EV21GXP Datasheet - Page 63

• Manufacturer Part Number: PEB20256EV21GXP
• Manufacturer: Infineon Technologies

Specifications of PEB20256EV21GXP

• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Compliant

NextReceiveDescriptorPointer
ReceiveDataPointer
FE
C
BNO
Data Sheet
This pointer contains the start address of the next valid receive
descriptor. After completion of the current receive descriptor the data
management unit branches to the next receive descriptor to continue
data reception.
System CPU can force the MUNICH256 to branch to the beginning of a
new linked list via the command ’Receive Abort/Branch’. In this case the
receive descriptor address provided via register CSPEC_FRDA is used
as the next receive descriptor pointer to be branched to.
This pointer contains the start address of the receive data section. The
start address must be DWORD aligned.
Frame End
It indicates that the current receive data section (addressed by
ReceiveDataPointer) contains the end of a frame. This bit is set by the
data management unit after transferring the last data of a frame from the
internal receive buffer into the receive data section which is located in
the shared memory. Moreover the bit field BNO and the status bits are
updated, the complete (C) bit is set and a ’Frame End’ interrupt vector is
generated.
Complete
This bit indicates that
•filling the data section has completed (with or without errors),
•processing of this descriptor was aborted by a ’Receive Abort/Branch’
•or the end of frame (PPP, HDLC) was stored in the receive data section.
The complete bit releases the descriptor.
Byte Number of Received Data
The data management unit writes the number of data bytes stored in the
current data section into bit field BNO.
command,
63
Functional Description
PEB 20256 E
PEF 20256 E
04.2001