AT90CAN32-16AU Detailed explanation of pin function specifications and circuit principle instructions

The AT90CAN32-16AU is a microcontroller from the Atmel AVR series, specifically designed for use in embedded systems with CAN (Controller Area Network) support. It belongs to the Atmel (now part of Microchip Technology) brand. This model is packaged in a 44-pin TQFP (Thin Quad Flat Package) or other variants depending on specific requirements.

Package Type and Pin Count:

Package Type: TQFP (Thin Quad Flat Package) Pin Count: 44 pins

Detailed Pin Function Specifications:

Below is a comprehensive explanation of each pin's function, with a list of all 44 pins and their respective functions:

Pin No. Pin Name Function Description 1 VCC Power supply pin (3.3V or 5V depending on configuration) 2 GND Ground pin 3 PC6 (RXD) Receive data pin for USART (serial communication) 4 PC7 (TXD) Transmit data pin for USART 5 PA0 General-purpose I/O pin, can be used for ADC input 6 PA1 General-purpose I/O pin, can be used for ADC input 7 PA2 General-purpose I/O pin, can be used for ADC input 8 PA3 General-purpose I/O pin, can be used for ADC input 9 PA4 General-purpose I/O pin 10 PA5 General-purpose I/O pin 11 PA6 General-purpose I/O pin, can also be used as TOSC2 (external Clock ) 12 PA7 General-purpose I/O pin, can also be used as TOSC1 (external clock) 13 PB0 General-purpose I/O pin, can be used for PWM or external interrupts 14 PB1 General-purpose I/O pin, can be used for PWM or external interrupts 15 PB2 General-purpose I/O pin, can be used for external interrupts or SPI communication 16 PB3 General-purpose I/O pin, can be used for external interrupts or SPI communication 17 PB4 General-purpose I/O pin, can be used for external interrupts or SPI communication 18 PB5 General-purpose I/O pin, can be used for external interrupts or SPI communication 19 PB6 General-purpose I/O pin, can be used for external interrupts or SPI communication 20 PB7 General-purpose I/O pin, can be used for external interrupts or SPI communication 21 PC0 General-purpose I/O pin, can be used for ADC input 22 PC1 General-purpose I/O pin, can be used for ADC input 23 PC2 General-purpose I/O pin, can be used for ADC input 24 PC3 General-purpose I/O pin, can be used for ADC input 25 PC4 General-purpose I/O pin, can be used for ADC input 26 PC5 General-purpose I/O pin, can be used for ADC input 27 PD0 General-purpose I/O pin, can be used for external interrupts or SPI communication 28 PD1 General-purpose I/O pin, can be used for external interrupts or SPI communication 29 PD2 General-purpose I/O pin, can be used for external interrupts or SPI communication 30 PD3 General-purpose I/O pin, can be used for external interrupts or SPI communication 31 PD4 General-purpose I/O pin, can be used for external interrupts or SPI communication 32 PD5 General-purpose I/O pin, can be used for external interrupts or SPI communication 33 PD6 General-purpose I/O pin, can be used for external interrupts or SPI communication 34 PD7 General-purpose I/O pin, can be used for external interrupts or SPI communication 35 Reset Reset pin (Active low, resets the microcontroller) 36 AVCC VCC for analog components (3.3V or 5V, same as VCC pin) 37 AREF Analog reference pin for ADC 38 GND Ground pin for analog components 39 TOSC1 External clock input pin for the timer, can also be used for external oscillators 40 TOSC2 External clock output pin for the timer 41 CANH CAN Bus High pin (used in CAN communication) 42 CANL CAN Bus Low pin (used in CAN communication) 43 SCK SPI Clock pin (Serial Peripheral interface ) 44 MISO SPI Master In Slave Out pin (used for SPI communication)

20 Frequently Asked Questions (FAQ) about AT90CAN32-16AU

What is the maximum operating frequency of the AT90CAN32-16AU? The AT90CAN32-16AU operates at a maximum frequency of 16 MHz. Can the AT90CAN32-16AU be used for CAN communication? Yes, the AT90CAN32-16AU supports CAN communication with a dedicated CAN controller integrated on the chip. What is the voltage range for the AT90CAN32-16AU? The operating voltage range is 2.7V to 5.5V. How many pins does the AT90CAN32-16AU have? The AT90CAN32-16AU comes in a 44-pin package. What is the maximum current output for the AT90CAN32-16AU? The maximum output current per pin is typically 20 mA. Does the AT90CAN32-16AU have an internal oscillator? Yes, the AT90CAN32-16AU has an internal 8 MHz RC oscillator. Can the AT90CAN32-16AU be used for external interrupts? Yes, it has multiple pins capable of handling external interrupts. What type of communication interfaces are available on the AT90CAN32-16AU? It supports USART, SPI, and CAN communication. Can I use the AT90CAN32-16AU for ADC applications? Yes, the AT90CAN32-16AU has a 10-bit ADC with up to 8 channels.

Does the AT90CAN32-16AU support PWM output?

Yes, the AT90CAN32-16AU has several pins that support PWM output.

How is the AT90CAN32-16AU reset?

It can be reset by applying a low signal to the reset pin or by using an external watchdog timer.

What is the function of the AREF pin?

The AREF pin is used as the reference voltage for the ADC.

Can the AT90CAN32-16AU be programmed in-system?

Yes, it supports in-system programming through the SPI interface.

How much memory does the AT90CAN32-16AU have?

It has 32 KB of flash memory for program storage and 2 KB of SRAM.

What is the function of the TOSC pins?

TOSC1 and TOSC2 are used for connecting an external clock oscillator to the microcontroller.

Is the AT90CAN32-16AU suitable for automotive applications?

Yes, it is designed for automotive and industrial applications requiring robust CAN communication.

Can I use the AT90CAN32-16AU for I2C communication?

No, the AT90CAN32-16AU does not have an I2C interface but supports SPI and USART.

What is the maximum CAN bus speed for AT90CAN32-16AU?

The maximum CAN bus speed is up to 1 Mbps.

Can the AT90CAN32-16AU be powered by batteries?

Yes, as long as the voltage is within the acceptable operating range (2.7V to 5.5V).

Does the AT90CAN32-16AU have sleep modes to save power?

Yes, it includes several sleep modes for low-power operation when the device is idle.

Conclusion:

This detailed specification and FAQ provide an in-depth overview of the AT90CAN32-16AU microcontroller, including all pin functions and common usage scenarios.