Atmel ATmega32M1 User Manual

224
7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
– 01 = No CRC, no Time out (listen mode “off”),
– 10 = No Frame_Time_Out (listen mode “off” & CRC “on”),
– 11 = Listening mode (CRC “on” & Frame_Time_Out “on”).
b. UART mode (default = 00):
– 00 = 8-bit, no parity (listen mode “off”),
– 01 = 8-bit, even parity (listen mode “off”),
– 10 = 8-bit, odd parity (listen mode “off”),
– 11 = Listening mode, 8-bit, no parity.
• Bit 3 - LENA: Enable
– 0 = Disable (both LIN and UART modes),
– 1 = Enable (both LIN and UART modes).
• Bit 2:0 - LCMD[2..0]: Command and mode
The command is only available if LENA is set.
–000 = LIN Rx Header - LIN abort,
– 001 = LIN Tx Header,
– 010 = LIN Rx Response,
– 011 = LIN Tx Response,
– 100 = UART Rx & Tx Byte disable,
– 11x = UART Rx Byte enable,
– 1x1 = UART Tx Byte enable.
17.6.2 LIN Status and Interrupt Register - LINSIR
• Bits 7:5 - LIDST[2:0]: Identifier Status
– 0xx = no specific identifier,
– 100 = Identifier 60 (0x3C),
– 101 = Identifier 61 (0x3D),
– 110 = Identifier 62 (0x3E),
– 111 = Identifier 63 (0x3F).
• Bit 4 - LBUSY: Busy Signal
– 0 = Not busy,
– 1 = Busy (receiving or transmitting).
Bit 76543210
LIDST2 LIDST1 LIDST0 LBUSY LERR LIDOK LTXOK LRXOK
LINSIR
Read/WriteRRRRR/W
one
R/W
one
R/W
one
R/W
one
Initial Value00000000

Atmel ATmega32M1 Specifications

General

Architecture	8-bit AVR
Flash Memory	32 KB
SRAM	2 KB
EEPROM	1 KB
Clock Speed	16 MHz
GPIO Pins	32
I/O Pins	32
ADC Channels	8
ADC Resolution	10-bit
UART	1
USART	1
SPI	1
I2C	1
PWM Channels	6
CAN	1
Operating Voltage	2.7V - 5.5V
Operating Temperature	-40°C to +85°C
Temperature Range	-40°C to +85°C
Package	44-TQFP, 44-QFN

Summary

Features

AVR CPU Core

Reset and Interrupt Handling

Explanation of interrupt sources, vectors, priority levels, and behavior during interrupt execution.

System Clock

System Clock Prescaler

Details on the CLKPR register for dividing the system clock to reduce power consumption and affect peripheral frequencies.

Power Management and Sleep Modes

8-bit Timer/Counter0 with PWM

Modes of Operation

Detailed explanation of Normal, CTC, and various PWM modes for Timer/Counter0 operation.

Controller Area Network - CAN

CAN Protocol

Explanation of the CAN protocol principles, standards, and message transmission priorities.

Error Management

Description of error detection mechanisms (message and bit level) and fault confinement states.

Analog to Digital Converter - ADC

Features

List of ADC capabilities including resolution, accuracy, conversion time, input channels, and reference voltages.

Starting a Conversion

Procedures for initiating ADC conversions, including single conversion and auto-triggering modes.

debugWIRE On-chip Debug System

Features

Overview of debugWIRE capabilities including program flow control, real-time operation, and symbolic debugging.

Boot Loader Support – Read-While-Write Self-Programming ATmega16/32/64/M1/C1

Self-Programming the Flash

Procedures and considerations for programming the Flash memory using the SPM instruction.

Memory Programming

Program And Data Memory Lock Bits

Fuse Bits

Electrical Characteristics

Absolute Maximum Ratings*

Critical voltage, current, and temperature limits that must not be exceeded for device reliability.

DC Characteristics

Instruction Set Summary

Register Summary