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ATmega16HVB Fiches technique(PDF) 43 Page - ATMEL Corporation

No de pièce ATmega16HVB
Description  8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash
PDF  273 Pages
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Fabricant  ATMEL [ATMEL Corporation]
Site Internet  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega16HVB Fiches technique(HTML) 43 Page - ATMEL Corporation

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43
8042A–AVR–07/09
ATmega16HVB/32HVB
Figure 11-1. Reset Logic
11.2.1
Power-on Reset and Charger Connect
The Voltage Regulator will not start up until the Charger Detect module has enabled it. Before
this happens the chip will be in Power-off mode and only the Charger Detect module is enabled.
In order for the Charger Detect module to enable the Voltage Regulator, the voltage at the BATT
pin must exceed the Power-On Threshold Voltage, V
POT. When the voltage at the BATT pin
exceeds V
POT, the Voltage Regulator starts up and the chip enters RESET mode. When the
Delay Counter times out, the chip will enter Active mode. See Figure 10-1 on page 36. For
details on Charger Detect, see ”Charger Detect” on page 129.
MCU Status
Register (MCUSR)
Reset Circuit
Delay Counters
CK
TIMEOUT
DATA BUS
Clock
Generator
SPIKE
FILTER
Pull-up Resistor
Ultra Low Power
RC Oscillator
SUT[1:0]
Power-on
Reset
Circuit/
Charger
Detect
Watchdog
Timer
RESET
/dW
VFET
BATT
POR
VREG
COUNTER RESET
Brown-out
Detection
VREG
debugWIRE



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