Atmel AVR AT90S2313 User Manual (English)

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AT90S2313

0839G–08/01

Sleep Modes To enter the sleep modes, the SE bit in MCUCR must be set (one) and a SLEEP instruc-

tion must be executed. 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.

Idle Mode When the SM bit is cleared (zero), the SLEEP instruction forces the MCU into the Idle

Mode, stopping the CPU but allowing Timer/Counters, Watchdog and the interrupt sys-

tem to continue operating. This enables the MCU to wake up from external triggered

interrupts as well as internal ones like Timer Overflow interrupt and Watchdog reset. If

wake-up from the Analog Comparator Interrupt is not required, the Analog Comparator

can be powered down by setting the ACD-bit in the Analog Comparator Control and Sta-

tus Register (ACSR). This will reduce power consumption in Idle Mode. When the MCU

wakes up from Idle Mode, the CPU starts program execution immediately.

Power-down Mode When the SM bit is set (one), the SLEEP instruction forces the MCU into 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), an external level interrupt on INT0 or INT1 can wake up the MCU.

Note that when a level-triggered interrupt is used for wake-up from power-down, the low

level must be held for a time longer than the reset delay Time-out period t

TOUT

. Other-

wise, the device will not wake up.

Timer/Counters The AT90S2313 provides two general-purpose Timer/Counters – one 8-bit T/C and one

16-bit T/C. The Timer/Counters have individual prescaling selection from the same 10-

bit prescaling timer. Both Timer/Counters can either be used as a timer with an internal

clock time base or as a counter with an external pin connection that triggers the

counting.

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Atmel AVR AT90S2313 Specifications

General

Architecture	AVR
CPU	8-bit
Manufacturer	Atmel
Model	AT90S2313
Flash Memory	2 KB
SRAM	128 Bytes
EEPROM	128 Bytes
Clock Speed	Up to 10 MHz
I/O Pins	15
Timer	1 x 8-bit, 1 x 16-bit
Operating Temperature Range	-40°C to +85°C
Data Bus Width	8-bit
Communication Interfaces	USART
Package	SOIC
Series	AVR AT90S