ST72521 STMICROELECTRONICS [STMicroelectronics], ST72521 Datasheet - Page 127

• Manufacturer Part Number: ST72521
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

10.8 CONTROLLER AREA NETWORK (CAN)
10.8.1 Introduction
This peripheral is designed to support serial data
exchanges using a multi-master contention based
priority scheme as described in CAN specification
Rev. 2.0 part A. It can also be connected to a 2.0 B
network without problems, since extended frames
Figure 67. CAN Block Diagram
TX
RX
10 Bytes
Buffer 1
TX/RX
BTL
10 Bytes
Buffer 2
TX/RX
BCDL
CAN 2.0B passive Core
EML
10 Bytes
Buffer 3
TX/RX
SHREG
ST7 Internal Bus
ST7 Interface
4 Bytes
Filter 0
are checked for correctness and acknowledged
accordingly although such frames cannot be trans-
mitted nor received. The same applies to overload
frames which are recognized but never initiated.
CRC
ID
4 Bytes
Filter 1
ID
BRPR
RECR
TECR
PSR
BTR
ICR
ISR
CSR
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