AN1077 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'AN1077' PDF : 14 Pages View PDF
OVERVIEW OF ENHANCED CAN CONTROLLERS FOR ST7 AND ST9 MCUS
Figure 4. Figure 4: beCAN Block Diagram
Master Control
Master Status
Transmit Status
Transmit Prio
Receive FiFO
Interrupt Enable
Page Select
Error Status
Error Int. Enable
Tx Error Counter
Rx Error Counter
Diagnostic
Bit Timing
Filter Master
Filter Config.
Tx Mailboxes
Mailbox 1
Receive FIFO
2
1
Mailbox 0
Mailbox 0
Transmission
Scheduler
Acceptance Filters
Filter
3
2
1
0
CAN 2.0B Active Core
The beCAN is based on the same FIFO and filter concept as bxCAN but targets applications
requiring less communication resources. This leads to a reduced processor interface function-
ality.
4 VALIDATION
BxCAN and beCAN are based on the CAN core of BOSCH’s C_CAN controller. This approach
limits the development risk, reusing the huge experience BOSCH has gained during more
than one decade of CAN controller development. To guarantee the compliance of the
BOSCH’s CAN core with the CAN standard, the C_CAN has been validated according to the
ISO standard 16845 „CAN Conformance Testing“. The validation has been performed by the
c&s group led by Prof. Dr. W. Lawrenz located in Wolfenbüttel, Germany.
For several years, c&s has been well accepted world wide as an organisation for CAN con-
troller validation.
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