ATmega16HVB Atmel Corporation, ATmega16HVB Datasheet - Page 122

• 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

21. Voltage reference and temperature sensor
21.1
21.2
21.3
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Features
Overview
Operation
ATmega16HVB/32HVB
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The Atmel ATmega16HVB/32HVB features a highly accurate low power On-chip Bandgap Ref-
erence Voltage, VREF of 1.100V. This reference voltage is used as reference for the On-chip
Voltage Regulator, the Brown-out Detector, the internal Cell Balancing, the Battery Protection,
the V-ADC and the CC-ADC.
Figure 21-1. Bandgap reference voltage.
In addition to the Bandgap Reference Voltage, the Voltage Reference includes a Calibration Unit
that enables run time calibration of the Reference Voltage, an On-chip temperature sensor for
monitoring the die temperature, and a Bandgap Short Detector to detect short circuit conditions
on the external VREF pin for highest safety.
When the device is in power-off state, the Voltage Reference will be switched off. After a Power-
on reset condition the Voltage Reference will automatically be enabled.
Accurate voltage reference of 1.100V
Voltage reference calibration interface
Internal temperature sensor
External decoupling for optimum noise performance
Short circuit detection on the external decoupling pin
Low power consumption
VPTAT
BG Control and Status
IRQ
w/ temperature sensor
BG Short Detector
Bangap Reference
Figure 21-1
8-bit databus
shows an overview of the On-chip voltage reference.
1.1V
BG Calibration
Buffer
BG
VREF
VREFGND
8042D–AVR–10/11