ATTINY461-20PU Atmel, ATTINY461-20PU Datasheet - Page 14
ATTINY461-20PU
Manufacturer Part Number
ATTINY461-20PU
Description
Microcontrollers (MCU) 4kB Flash 0.256kB EEPROM 16 I/O Pins
Manufacturer
Atmel
Specifications of ATTINY461-20PU
Processor Series
ATTINY4x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
2-Wire/SPI/USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
2
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
11-ch x 10-bit
Program Memory Type
Flash
Program Memory Size
4 KB
Package / Case
PDIP-20
Package
20PDIP
Device Core
AVR
Family Name
ATtiny
Maximum Speed
20 MHz
Ram Size
256 Byte
Operating Temperature
-40 to 85 °C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.7.1
14
ATtiny261/461/861
Interrupt Response Time
Note:
The interrupt execution response for all the enabled AVR interrupts is four clock cycles mini-
mum. After four clock cycles the Program Vector address for the actual interrupt handling routine
is executed. During this four clock cycle period, the Program Counter is pushed onto the Stack.
The vector is normally a jump to the interrupt routine, and this jump takes three clock cycles. If
an interrupt occurs during execution of a multi-cycle instruction, this instruction is completed
before the interrupt is served. If an interrupt occurs when the MCU is in sleep mode, the interrupt
execution response time is increased by four clock cycles. This increase comes in addition to the
start-up time from the selected sleep mode.
A return from an interrupt handling routine takes four clock cycles. During these four clock
cycles, the Program Counter (two bytes) is popped back from the Stack, the Stack Pointer is
incremented by two, and the I-bit in SREG is set.
C Code Example
_SEI();
_SLEEP();
See
“Code Examples” on page
/* set Global Interrupt Enable */
/* enter sleep, waiting for interrupt */
/* note: will enter sleep before any pending interrupt(s) */
6.
2588E–AVR–08/10
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