ATtiny461 Automotive Atmel Corporation, ATtiny461 Automotive Datasheet - Page 41

• Manufacturer Part Number: ATtiny461 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny461 Automotive

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9.0.3
7753F–AVR–01/11
Power-on Reset
Figure 9-1.
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 9-2.
CC
INTERNAL
is below the detection level. The POR circuit can be used to trigger the Start-up Reset, as
TIME-OUT
V
CC
RESET
CC
RESET
decreases below the detection level.
V
CCRR
BODLEVEL [1..0]
“System and Reset Characteristics” on page
Reset Logic
MCU Start-up, RESET Tied to V
V
Pull-up Resistor
V
V
RST
PORMAX
PORMIN
FILTER
SPIKE
CC
t
TOUT
rise. The RESET signal is activated again, without any delay,
ATtiny261/ATtiny461/ATtiny861
CKSEL[1:0]
Power-on Reset
Reset Circuit
SUT[1:0]
Watchdog
Brown-out
Oscillator
Generator
Circuit
Clock
CK
CC
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
190. The POR is activated whenever
TIMEOUT
41