peb3456 Infineon Technologies Corporation, peb3456 Datasheet - Page 62

• Manufacturer Part Number: peb3456
• Description: Channelized T3 Termination With Ds3 Framer, M13 Multiplexer, T1/ E1 Framers And 256 Channel Hdlc/ppp Controller
• Manufacturer: Infineon Technologies Corporation

DescriptorID
NO
RHI
OFFSET
Data Sheet
Receive Host Initiated Interrupt
This bit indicates that the TE3-CHATT shall generate a ’Receive Host
Initiated’ interrupt vector after it has finished processing the descriptor.
0
1
Offset of unused data section.
This bit field allows to reserve memory space in increments of DWORDs
for an additional header. If the marked descriptor is the first one of a new
packet the data management unit will write data at the address
ReceiveDataPointer+4xOFFSET.
Note: Offset x 4 must be smaller than NO.
Note: This option is not available in transparent mode.
This bit field is read by the data management unit and written back in the
corresponding interrupt status of a channel interrupt vector which is
generated by the data management unit. This value provides a link
between the descriptor and the corresponding interrupt vector.
Byte Number
This bit field defines the size of the receive data section allocated by the
host. The maximum buffer length is 65535 bytes and it has to be a
multiple of 4 bytes. Data bytes are stored in the receive data section
according to the selected mode (little endian or big endian).
Note: Please note that the device handles the status (CRC, flag and
Data management unit does not generate an interrupt vector
after it has processed the receive descriptor.
Data management unit generates an interrupt vector, as soon as
all data bytes are transferred into the current data section and the
status information is updated.
frame status) of frame based protocols (HDLC, PPP) internally in
the same way as payload data. Therefore byte number should
include four bytes more than the maximum length of incoming
frames. Nevertheless, the frame status will be deleted from the
end of the data stream and be attached as a status word to the
receive descriptor. The frame status will not be written to the data
section.
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Functional Description
PEB 3456 E
05.2001