Atmel STK526, Руководство пользователя, Страница: 11 / 38

Using the STK526
STK526 rev. B Hardware User Guide 2-11
7709B–AVR–05/07
2.2.4 “POWER-ON“ LED
The POWER-ON LED is always lit when power is applied to STK526 regardless of
power supply source and the regulation.
Figure 2-6 . “VCC-ON” LED
2.3 RESET
Although the AT90USB82/162 has its on-chip RESET circuitry (c.f. AT90USB82/162
Datasheet, section “System Control and Reset), the STK526 provides the
AT90USB82/162 a RESET signal which can come from 3 different sources:
2.3.1 Power-on RESET
The power supply rise time acts as power-on RESET.
2.3.2 RESET Push Button
By pressing the RESET push button on the STK526, a warm RESET of the
AT90USB82/162 is performed.
Figure 2-7 . RESET Push Button (RST) Implementation