ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 129

• Manufacturer Part Number: ATmega16HVB
• Manufacturer: Atmel Corporation

Specifications of ATmega16HVB

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 17
• Ext Interrupts: 15
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

23. Voltage regulator
23.1
23.2
8042D–AVR–10/11
Features
Overview
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The Atmel ATmega16HVB/32HVB get its voltage supply through the VFET terminal. Operating
range at the VFET terminal is 4V - 18V. The on-chip LDO regulator regulates the VFET terminal
down to 3.3V, which is a suitable supply voltage for the internal logic, I/O lines and analog cir-
cuitry.
Figure 23-1. Voltage regulator.
To ensure safe operating condition the Voltage Regulator has built in protection mechanisms to
protect the internal circuitry if the voltage drops on either the input or output terminal. The Regu-
lator Monitoring includes.
• Battery Pack Short Detector
• Black-out Detector
An external decoupling capacitor (CREG) of minimum 1µF is needed to ensure stable regulator
operation. The same capacitor also serves as a reservoir capacitor to ensure that the chip is
able to operate for some time without voltage at the VFET terminal.
Input voltage from 4V - 18V
Fixed output voltage of 3.3V
Battery pack short detection
Black-out detection (BLOD)
VFET
Figure 23-1
illustrates the Voltage Regulator.
DISABLE VFET
Short Detect
Battery
and Control Interface
Regulator Monitor
LDO Regulator
ROCR
Databus
Black-out
ATmega16HVB/32HVB
Detect
IRQ
BLOD
POWER-OFF
VREG
CREG
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