ATmega16HVB datasheet(44/273 Pages) ATMEL

部件名	ATmega16HVB

功能描述	8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash

PDF	273 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

标志

44 / 273 page

8042A–AVR–07/09

ATmega16HVB/32HVB

Figure 11-2. Powering up ATmega16HVB/32HVB

11.2.2

External Reset

An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the

minimum pulse width (see Table 32-3 on page 230) will generate a reset, even if the clock is not

running. Shorter pulses are not guaranteed to generate a reset. When the applied signal

reaches the Reset Threshold Voltage – V

RST – on its positive edge, the delay counter starts the

MCU after the Time-out period – t

TOUT – has expired.

Figure 11-3. External Reset During Operation

11.2.3

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 46 for details on operation of the Watchdog Timer.

Power-off

SLEEP_MODE

POR

BATT

INTERNAL_RESET

TOUT

Reset

Active

POT

REG

3.3 V

ATmega16HVB 数据表(PDF) 44 Page - ATMEL Corporation