PEF20550HV21XT Lantiq, PEF20550HV21XT Datasheet - Page 71

• Manufacturer Part Number: PEF20550HV21XT
• Manufacturer: Lantiq

Specifications of PEF20550HV21XT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

RFIFO Handling/Steps
Receive frame
After 32 bytes are
received
After next 31/32 bytes are
received
Additional I-poll
Additional RR-poll
Read and acknowledge
RFIFO
Read and acknowledge
RFIFO
Read and acknowledge
RFIFO
Depending on the number of bytes to be stored in the RFIFO the following behavior
occurs:
Multiple shorter frames results in the same behavior, e.g.
frame 1:
frame 2 - n: total of 31 bytes including receive status bytes for frame 2 - (n
cause the case 1.
Semiconductor Group
1 - 31 bytes
Case 1
Total frame length:
63 data bytes
A RPF-interrupt is issued, the RFIFO is not acknowledged
Control response,
no overflow
indication
RFO-interrupt, I-response with overflow indication or I-data
if stored in XFIFO as prepared data
RFO-interrupt, RR-response or I-data if stored in XFIFO as
direct data
RME-interrupt
RDO-bit is not set,
frame is complete
71
Case 2
Total frame length:
64 data bytes
Control response
with overflow
indication
RPF-interrupt
RME-interrupt
RDO-bit is set,
frame is
complete but
indicated as
incomplete
Functional Description
Case 3
RPF-interrupt
RME-interrupt
Total frame length:
65 data bytes or
more
Control response
with overflow
indication
RDO-bit is set,
frame is not
complete
PEB 20550
PEF 20550
1)
01.96