ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 21
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ATA5773-DK1
Manufacturer Part Number
ATA5773-DK1
Description
BOARD XMITTER FOR ATA5773 315MHZ
Manufacturer
Atmel
Type
Transmitterr
Specifications of ATA5773-DK1
Frequency
315MHz
Maximum Frequency
315 MHz
Supply Voltage (max)
4 V
Supply Voltage (min)
2 V
Supply Current
9 mA
Product
RF Development Tools
For Use With/related Products
ATA5773
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.7.8.1
9137E–RKE–12/10
Interrupt Response Time
When using the SEI instruction to enable interrupts, the instruction following SEI will be exe-
cuted before any pending interrupts, as shown in this example.
The interrupt execution response for all the enabled Atmel
cycles minimum. 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.
Assembly Code Example
C Code Example
sei
sleep; enter sleep, waiting for interrupt
; note: will enter sleep before any pending
; interrupt(s)
_SEI(); /* set Global Interrupt Enable */
_SLEEP(); /* enter sleep, waiting for interrupt */
/* note: will enter sleep before any pending interrupt(s) */
; set Global Interrupt Enable
Atmel ATA5771/73/74
®
AVR
®
interrupts is four clock
21
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