PEB20321 datasheet(91/366 Pages) INFINEON

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PEB 20321

PEF 20321

Detailed Protocol Description

Data Sheet

2001-02-14

ERR: issued if one of the following error conditions has occurred:

– FCS was incorrect

– the bit length was greater than MFL

– the frame was stopped by 7FH

– the frame could only be partly stored because of internal buffer overflow of RB

– a fast receive abort channel command was issued

– a receive abort channel command was detected during reception of a frame

– a frame could only be partly transferred to the shared memory because of a

receive descriptor with HOLD bit set

(maskable by RE in the channel spec.)

FO:

issued if due to inaccessibility of internal buffer RB

– one ore more complete frames have been lost

– one ore more changes of interframe time-fill state were lost

(maskable by RE in the channel spec.)

Note that all receive interrupts are maskable by setting the bit field RID in MODE1

Example:

HDLC channel with

CS = 1

(FCS transferred to shared memory)

INV = 0

(no inversion)

CRC = 1

(CRC 32)

TRV = 00

(required as unused in HDLC mode)

FA = x

(irrelevant in Rx direction)

MODE = 11

(HDLC)

IFTF = x

(irrelevant in Rx direction)

Big Endian Data Format

Channel No. 1D

MFL = 10

PEB20321 Datasheet(PDF) 91 Page - Infineon Technologies AG