ATtiny25-15ST datasheet(39/196 Pages) ATMEL

Teilenummer	ATtiny25-15ST

Bauteilbeschribung	8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

PDF	196 Pages

Scroll/Zoom	100%

Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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39 / 196 page

7598H–AVR–07/09

ATtiny25/45/85

When the BOD is enabled, and V

CC decreases to a value below the trigger level (VBOT- in Figure

8-5), the Brown-out Reset is immediately activated. When V

CC increases above the trigger level

BOT+ in Figure 8-5), the delay counter starts the MCU after the Time-out period tTOUT has

expired.

The BOD circuit will only detect a drop in V

CC if the voltage stays below the trigger level for lon-

ger than t

BOD given in Table 8-1.

Figure 8-5.

Brown-out Reset During Operation

8.6

Watchdog Reset

When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On

the falling edge of this pulse, the delay timer starts counting the Time-out period t

TOUT. Refer to

page 41 for details on operation of the Watchdog Timer.

Figure 8-6.

Watchdog Reset During Operation

VCC

RESET

TIME-OUT

INTERNAL

RESET

VBOT-

VBOT+

tTOUT

ATtiny25-15ST Datenblatt(PDF) 39 Page - ATMEL Corporation