ATAVRMC321 Atmel, ATAVRMC321 Datasheet - Page 14

• Manufacturer Part Number: ATAVRMC321
• Description: KIT EVAL MOTOR CTRL LOW COST
• Manufacturer: Atmel
• Series: AVR®r

Specifications of ATAVRMC321

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATtinyx61
• Primary Attributes: 3-Ph BLDC, Brushed DC, Stepper Motor- Controller Board
• Secondary Attributes: Includes ATAVRMC300 Power Driver Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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