ST92250CV2Q-Auto STMicroelectronics, ST92250CV2Q-Auto Datasheet - Page 336
ST92250CV2Q-Auto
Manufacturer Part Number
ST92250CV2Q-Auto
Description
8-bit MCU for automotive
Manufacturer
STMicroelectronics
Datasheet
1.ST92150JDV1QAUTO.pdf
(430 pages)
Specifications of ST92250CV2Q-Auto
Internal Memory
Single Voltage FLASH up to 256 Kbytes, RAM up to 8Kbytes, 1K byte E3 TM (Emulated EEPROM)
Minimum Instruction Time
83 ns (24 MHz int. clock)
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ST92124xxx-Auto/150xxxxx-Auto/250xxxx-Auto
CONTROLLER AREA NETWORK (Cont’d)
Figure 150. Filtering Mechanism - example
The example above shows the filtering principle of
the bxCAN. 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 associated FIFO and the in-
dex of the matching filter is stored in the Filter
Match Index. As shown in the example, the identi-
fier matches with Identifier #2 thus the message
content and MFMI 2 is stored in the FIFO.
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9
Message Discarded
Identifier
Mask
Identifier
Identifier
Identifier
Identifier
Identifier
Mask
No Match
Found
Identifier
n+m
n+1
n
2
0
1
Ctrl
Identifier #2 Match
Message Received
n: number of single identifiers to receive
m: number of identifier groups to receive
n and m values depend on the configuration of the filters
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 disturbing the soft-
ware.
Data
Receive FIFO
Message
Stored
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