ST72561J6 STMicroelectronics, ST72561J6 Datasheet - Page 180

• Manufacturer Part Number: ST72561J6
• Description: 8-BIT MCU WITH FLASH OR ROM, 10-BIT ADC, 5 TIMERS, SPI, LINSCI(TM), ACTIVE CAN
• Manufacturer: STMicroelectronics

Specifications of ST72561J6

• Hdflash Endurance: 100 cycles, data retention 40 years at 85°C
• 5 Power Saving Modes: Halt, Auto Wake Up From Halt, Active Halt, Wait and Slow

ST72561
beCAN CONTROLLER (Cont’d)
Figure 103. Filtering Mechanism - example
The example above shows the filtering principle of
the beCAN. On reception of a message, the iden-
tifier is compared first with the filters configured in
identifier list mode. If there is a match, the mes-
sage is stored in the FIFO and the index of the
matching filter is stored in the Filter Match Index.
As shown in the example, the identifier matches
with Identifier #2 thus the message content and
MFMI 2 is stored in the FIFO.
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Message Discarded
Identifier
Identifier
Mask
Identifier
Mask
Identifier
Identifier
Identifier
No Match
Found
Identifier
n+m
n+1
n
1
2
0
Ctrl
Identifier #2 Match
Message Received
n: number of single identifiers to receive
n and m values depend on the configuration of the filters
m: number of identifier groups to receive
If there is no match, the incoming identifier is then
compared with the filters configured in mask
mode.
If the identifier does not match any of the identifi-
ers configured in the filters, the message is dis-
carded by hardware without software intervention.
Data
Receive FIFO
Message
Stored