PEB22554 SIEMENS [Siemens Semiconductor Group], PEB22554 Datasheet - Page 171

• Manufacturer Part Number: PEB22554
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

RDO…
CRC16…
RAB…
HA1, HA0…
Semiconductor Group
– a frame which is too short taking into account the operation mode
Note: Shorter frames are not reported.
Receive Data Overflow
A RFIFO data overflow has occurred during reception of the frame.
Additionally,
ISR1.RDO/IMR1.RDO).
CRC16 Compare/Check
Receive Message Aborted
The received frame was aborted from the transmitting station.
According to the HDLC protocol, this frame must be discarded by the
receiver station.
High Byte Address Compare
Significant only if 2-byte address mode has been selected.
In operating modes which provide high byte address recognition, the
QuadFALC compares the high byte of a 2-byte address with the
contents of two individually programmable registers (RAH1, RAH2)
and the fixed values FE
Dependent on the result of this comparison, the following bit
combinations are possible:
Note: If RAH1, RAH2 contain identical values, a match is indicated
0… CRC check failed; received frame contains errors.
1… CRC check o.k.; received frame is error-free.
00… RAH2 has been recognized
01… Broadcast address has been recognized
10… RAH1 has been recognized C/R = 0 (bit 1)
11… RAH1 has been recognized C/R = 1 (bit 1)
selected via MODE (MDS2-0) and the selection of receive CRC
ON/OFF (CCR2.RCRC) as follows:
• MDS2-0 = 011 (16 bit Address),
• MDS2-0 = 010 (8 bit Address),
RCRC = 0 : 4 bytes; RCRC = 1 : 3-4 bytes
RCRC = 0 : 3 bytes; RCRC = 1 : 2-3 bytes
by ‘10’ or ‘11’.
an
interrupt
171
H
and FC
can
H
(broadcast address).
be
Operational Description E1
generated
PEB 22554
(refer
09.98
to