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CAN Bus Controller

23/08/2024

A complete CAN Node requires a CAN controller, a CAN transceiver and a microcontroller.

The devices are developed as stand-alone CAN (Controller Area Network) controllers. For the connection to the physical layer additional transceiver hardware is required. Two pins of CANTX and CANRX interface to the CAN BUS Transceiver. The devices include a SPI and I2C interfaces to communicate with a microcontroller.

The HT45B3305H/HT45B3315 CAN Module licensed from Bosch. The HT45B3305H/HT45B3315 CAN supports the CAN 2.0 Part A and B protocol specifications and compatible with the ISO11898-1 standards. This CAN Module abbreviated as C_CAN. It is capable of transmitting and receiving standard and extended messages. It also capable of both acceptance filtering and message handler and includes 32 Message Objects which can be concatenated to configurate FIFO buffer with different depth. The SPI interface with data rate of up 10MHz and I2C serial interface are provided for communication with a SPI or I2C based 8-bit MCU.

Main Features

  • Operating Voltage: 3.0V~5.5V
  • Oscillator Type: High Speed External Crystal – HXT\
  • Sleep Mode and Idle Mode
  • 32-byte Write Buffer with Data Check Unit for communicating with Host MCUs
  • Serial Communication Interfaces – I2C or SPI (up to 10MHz SPI data rate)
  • - For HT45B3305H only, in order to ensure correct data transmission, the SPI and I2C interfaces cannot be used in one(master MCU)-to-multiple(slave devices) situations
  • Clock Out pin with programmable prescaler
  • Interrupt output pins with selectable active level configuration
Documents Tech question
Holtek HT45 B3315

CAN Bus Controller

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Holtek

Holtek Semiconductor is a leading professional IC design house in Taiwan having its major business activities focused in the area of microcontroller and peripheral component design.

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Documents

  • Holtek HT45 B3305 H Datasheet
Pexels thisisengineering 3913017

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