ATMEGA16HVA-4CKU Atmel, ATMEGA16HVA-4CKU Datasheet - Page 42

• Manufacturer Part Number: ATMEGA16HVA-4CKU
• Description: MCU AVR 16K FLASH 4MHZ 36-LGA
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16HVA-4CKU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 7
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 9 V
• Data Converters: A/D 5x12b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 36-LGA
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 4 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRSB200, ATAVRSB201
• Minimum Operating Temperature: - 20 C
• On-chip Adc: 12 bit, 5 Channel
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.2.1
42
ATmega8HVA/16HVA
Power-on Reset and Charger Connect
Figure 11-1. Reset Logic
The Voltage Regulator will not start up until the Charger Detect module has enabled the Voltage
Regulator. 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, V
BATT pin exceeds V
to
See
Figure 11-2 on page
Figure 10-1 on page
RESET
V
BATT
/dW
FET
V
REG
Pull-up Resistor
POT
FILTER
SPIKE
V
REG
, the Voltage Regulator starts up and the chip enters RESET mode, refer
43. When the Delay Counter times out, the chip will enter Active mode.
35.
Ultra Low Power
RC Oscillator
Reset Circuit
SUT[2:0]
debugWIRE
Watchdog
Brown-out
Power-on
Detection
Generator
Charger
Circuit/
Detect
Timer
Reset
Clock
POR
CK
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
COUNTER RESET
TIMEOUT
POT
. When the voltage at the
8024A–AVR–04/08