ATMEGA32M1-MU Atmel, ATMEGA32M1-MU Datasheet - Page 43

• Manufacturer Part Number: ATMEGA32M1-MU
• Description: MPU AVR 32K FLASH 20MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32M1-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: CAN, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -

10.2.1
8209D–AVR–11/10
Power-on Reset
Figure 10-1. Reset Logic
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
V
well as to detect a failure in supply voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 10-2. MCU Start-up, RESET Tied to V
CC
is below the detection level. The POR circuit can be used to trigger the start-up Reset, as
CC
BODLEVEL [2..0]
INTE R NAL
V
TIME -OUT
decreases below the detection level.
CC
R E S E T
R E S E T
“System and Reset Characteristics” on page
V
CCRR
Pull-up Resistor
V
Spike
Filter
V
V
R S T
PORMAX
PORMIN
CC
rise. The RESET signal is activated again, without any delay,
t
CKSEL[3:0]
TOUT
Power-on Reset
Reset Circuit
SUT[1:0]
Brown-out
Watchdog
Oscillator
Generator
Circuit
Clock
CC
ATmega16M1/32M1/64M1
CK
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
311. The POR is activated whenever
TIMEOUT
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