ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 44
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ATMEGA8HVD-4MX
Manufacturer Part Number
ATMEGA8HVD-4MX
Description
MCU AVR 8K FLASH 2.1-8V 4MHZ QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8HVD-4MX.pdf
(168 pages)
Specifications of ATMEGA8HVD-4MX
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Peripherals
POR, WDT
Number Of I /o
5
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 2.4 V
Data Converters
A/D 1x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
18-MLF® Exposed Pad (Staggered Leads), DFN
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Connectivity
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ATmega4HVD/8HVD
Figure 10-9. Powering up ATmega4HVD/8HVD (2-FET example)
During the initial start-up when a valid reference for the voltage regulator is missing, VCC is
driven as close as possible to VFET. Voltage regulation will only start when VCC has reached
VBLOT, start-up, which represents the voltage level that guarantees proper start-up conditions
for the voltage regulator.
Even though the voltage regulator has started up and the digital part is powered, the chip is
kept in the RESET state and cell charging is disabled until VCC exceeds V
time from a charger is connected until this happens is very short in the two- FET application
(actual timing depends on the CREG value). Once the condition VCC > V
BLOD is released and the Reset Delay counter starts counting. For details, see
Deep Under-Voltage Recovery Mode operation” on page
VCC will now be regulated to its nominal value. The Reset Delay counter makes sure that the
chip is continuously kept in RESET state internally for a time corresponding to the start-up
time selected by the SUT fuses (time indicated as t
INTERNAL_RESET
V
CHIP STATE
BLOT, START-UP
BLOD
V
V
2.2 V
POR
V
BATT
CC
OC
OD
POT
CHARGER CONNECTED
Power-off
CHARGER DETECTED
TOUT
in
117.
Figure 10-9 on page
Reset
t
TOUT
Active
BLOT, start-up is
BLOT, start-up
44).
8052B–AVR–09/08
”DUVR –
. The
met,
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