ST72561R9 STMicroelectronics, ST72561R9 Datasheet - Page 171
ST72561R9
Manufacturer Part Number
ST72561R9
Description
8-BIT MCU WITH FLASH OR ROM, 10-BIT ADC, 5 TIMERS, SPI, LINSCI(TM), ACTIVE CAN
Manufacturer
STMicroelectronics
Datasheet
1.ST72561R9.pdf
(265 pages)
Specifications of ST72561R9
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
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beCAN CONTROLLER (Cont’d)
CAN 2.0B Active Core
The beCAN module handles the transmission and
the reception of CAN messages fully autonomous-
ly. Standard identifiers (11-bit) and extended iden-
tifiers (29-bit) are fully supported by hardware.
Control, Status and Configuration Registers
The application uses these registers to:
– Configure CAN parameters, e.g.baud rate
– Request transmissions
– Handle receptions
– Manage interrupts
– Get diagnostic information
Figure 95. CAN 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.
Transmission
Tx Mailboxes
Mailbox 1
Scheduler
Mailbox 0
CAN 2.0B Active Core
Tx Mailboxes
Two transmit mailboxes are provided to the soft-
ware for setting up messages. The Transmission
Scheduler decides which mailbox has to be trans-
mitted first.
Acceptance Filters
The beCAN provides six scalable/configurable
identifier filter banks for selecting the incoming
messages the software needs and discarding the
others.
Receive FIFO
The receive FIFO is used by the CAN controller to
store the incoming messages. Three complete
messages can be stored in the FIFO. The software
always accesses the next available message at
the same address. The FIFO is managed com-
pletely by hardware.
Filter
Acceptance Filters
Mailbox 0
Receive FIFO
0
1 2
1
1
3
2
4
5
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