AT94K10AL-25DQC Atmel, AT94K10AL-25DQC Datasheet - Page 69
AT94K10AL-25DQC
Manufacturer Part Number
AT94K10AL-25DQC
Description
Manufacturer
Atmel
Datasheet
1.AT94K10AL-25DQC.pdf
(204 pages)
Specifications of AT94K10AL-25DQC
Device System Gates
10000
Propagation Delay Time
12.7ns
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
3V
Operating Temperature Classification
Commercial
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Mounting
Surface Mount
Pin Count
208
Package Type
PQFP
Lead Free Status / RoHS Status
Not Compliant
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
AT94K10AL-25DQC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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4.16.7
4.17
4.17.1
4.17.2
1138I–FPSLI–1/08
Sleep Modes
Interrupt Response Time
Idle Mode
Power-down Mode
The interrupt execution response for all the enabled AVR interrupts is four clock cycles mini-
mum. Four clock cycles after the interrupt flag has been set, the program vector address for the
actual interrupt handling routine is executed. During this four clock-cycle period, the Program
Counter (2 bytes) is pushed onto the Stack, and the Stack Pointer is decremented by 2. 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 serviced.
A return from an interrupt handling routine (same as for a subroutine call routine) takes four
clock cycles. During these four clock cycles, the Program Counter (2 bytes) is popped back from
the Stack, and the Stack Pointer is incremented by 2. When the AVR exits from an interrupt, it
will always return to the main program and execute one more instruction before any pending
interrupt is serviced.
To enter any of the three Sleep modes, the SE bit in MCUR must be set (one) and a SLEEP
instruction must be executed. The SM1 and SM0 bits in the MCUR register select which Sleep
mode (Idle, Power-down, or Power-save) will be activated by the SLEEP instruction, see
4-3
In Power-down and Power-save modes, the four external interrupts, EXT_INT0...3, and FPGA
interrupts, FPGA INT0...3, are triggered as low level-triggered interrupts. If an enabled interrupt
occurs while the MCU is in a Sleep mode, the MCU awakes, executes the interrupt routine, and
resumes execution from the instruction following SLEEP. The contents of the register file,
SRAM, and I/O memory are unaltered. If a reset occurs during Sleep mode, the MCU wakes up
and executes from the Reset vector
When the SM1/SM0 bits are set to 00, the SLEEP instruction makes the MCU enter the Idle
mode, stopping the CPU but allowing UARTs, Timer/Counters, Watchdog 2-wire Serial and the
Interrupt System to continue operating. This enables the MCU to wake-up from external trig-
gered interrupts as well as internal ones like the Timer Overflow and UART Receive Complete
interrupts. When the MCU wakes up from Idle mode, the CPU starts program execution
immediately.
When the SM1/SM0 bits are set to 10, the SLEEP instruction makes the MCU enter the Power-
down mode. In this mode, the external oscillator is stopped, while the external interrupts and the
watchdog (if enabled) continue operating. Only an external reset, a watchdog reset (if enabled),
or an external level interrupt can wake-up the MCU.
In Power-down and Power-save modes, the four external interrupts, EXT_INT0...3, and FPGA
interrupts, FPGA_INT0...3, are treated as low-level triggered interrupts.
If a level-triggered interrupt is used for wake-up from Power-down mode, the changed level must
be held for some time to wake-up the MCU. This makes the MCU less sensitive to noise. The
changed level is sampled twice by the watchdog oscillator clock, and if the input has the required
level during this time, the MCU will wake-up. The period of the watchdog oscillator is 1 µs (nom-
inal) at 3.3V and 25° C. The frequency of the watchdog oscillator is voltage dependent.
on
page
54.
AT94KAL Series FPSLIC
Table
69
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