- •Features
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- •Block Diagram
- •Pin Descriptions
- •Port A (PA7..PA0)
- •Port B (PB7..PB0)
- •Port C (PC7..PC0)
- •Port D (PD7..PD0)
- •RESET
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- •XTAL2
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- •Power-save Mode
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- •Brown-out Detector
- •Watchdog Timer
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- •Power-on Reset
- •External Reset
- •Watchdog Reset
- •Watchdog Timer
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- •Introduction
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- •Alternate Port Functions
- •Register Description for I/O Ports
- •8-bit Timer/Counter0 with PWM
- •Overview
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- •Definitions
- •Counter Unit
- •Normal Mode
- •Fast PWM Mode
- •8-bit Timer/Counter Register Description
- •Timer/Counter0 and Timer/Counter1 Prescalers
- •Internal Clock Source
- •Prescaler Reset
- •External Clock Source
- •16-bit Timer/Counter1
- •Overview
- •Registers
- •Definitions
- •Compatibility
- •Counter Unit
- •Input Capture Unit
- •Noise Canceler
- •Force Output Compare
- •Normal Mode
- •Fast PWM Mode
- •16-bit Timer/Counter Register Description
- •8-bit Timer/Counter2 with PWM and Asynchronous Operation
- •Overview
- •Registers
- •Definitions
- •Counter Unit
- •Normal Mode
- •Fast PWM Mode
- •8-bit Timer/Counter Register Description
- •Slave Mode
- •Master Mode
- •Data Modes
- •USART
- •Overview
- •Clock Generation
- •External Clock
- •Frame Formats
- •Parity Bit Calculation
- •Parity Generator
- •Receiver Error Flags
- •Parity Checker
- •Disabling the Receiver
- •Using MPCM
- •Write Access
- •Read Access
- •Features
- •TWI Terminology
- •Transferring Bits
- •Address Packet Format
- •Data Packet Format
- •Overview of the TWI Module
- •SCL and SDA Pins
- •Bus Interface Unit
- •Address Match Unit
- •Control Unit
- •Using the TWI
- •Master Receiver Mode
- •Slave Receiver Mode
- •Miscellaneous States
- •Analog Comparator Multiplexed Input
- •Analog to Digital Converter
- •Features
- •Operation
- •Changing Channel or Reference Selection
- •ADC Input Channels
- •Analog Input Circuitry
- •Features
- •Overview
- •TAP Controller
- •PRIVATE0; $8
- •PRIVATE1; $9
- •PRIVATE2; $A
- •PRIVATE3; $B
- •Bibliography
- •IEEE 1149.1 (JTAG) Boundary-scan
- •Features
- •System Overview
- •Data Registers
- •Bypass Register
- •Reset Register
- •EXTEST; $0
- •IDCODE; $1
- •AVR_RESET; $C
- •BYPASS; $F
- •Scanning the ADC
- •ATmega16 Boundary-scan Order
- •Features
- •Application Section
- •Read-While-Write and no Read- While-Write Flash Sections
- •Prevent Reading the RWW Section during Self-Programming
- •Simple Assembly Code Example for a Boot Loader
- •Fuse Bits
- •Latching of Fuses
- •Signature Bytes
- •Calibration Byte
- •Page Size
- •Signal Names
- •Chip Erase
- •Reading the Flash
- •Reading the EEPROM
- •Data Polling Flash
- •Data Polling EEPROM
- •AVR_RESET ($C)
- •PROG_ENABLE ($4)
- •Data Registers
- •Reset Register
- •Programming Enable Register
- •Programming Command Register
- •Virtual Flash Page Read Register
- •Performing Chip Erase
- •Reading the Flash
- •Reading the EEPROM
- •Electrical Characteristics
- •Absolute Maximum Ratings*
- •DC Characteristics
- •External Clock Drive Waveforms
- •External Clock Drive
- •Two-wire Serial Interface Characteristics
- •ADC Characteristics
- •Idle Supply Current
- •Pin Pullup
- •Pin Driver Strength
- •Register Summary
- •Instruction Set Summary
- •Ordering Information
- •Packaging Information
- •Errata
ATmega16(L)
ADC Characteristics
Table 122. |
ADC Characteristics |
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Symbol |
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Parameter |
Condition |
Min(1) |
Typ(1) |
Max(1) |
Units |
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Single Ended Conversion |
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10 |
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Bits |
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Differential Conversion |
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8 |
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Bits |
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Resolution |
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Gain = 1x or 10x |
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Differential Conversion |
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7 |
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Bits |
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Gain = 200x |
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Single Ended Conversion |
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VREF = 4V, VCC = 4V |
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1.5 |
2.5 |
LSB |
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ADC clock = 200 kHz |
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Single Ended Conversion |
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VREF = 4V, VCC = 4V |
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3 |
4 |
LSB |
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ADC clock = 1 MHz |
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Absolute Accuracy (Including INL, DNL, |
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Single Ended Conversion |
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Quantization Error, Gain, and Offset Error). |
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VREF = 4V, VCC = 4V |
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1.5 |
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LSB |
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ADC clock = 200 kHz |
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Noise Reduction mode |
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Single Ended Conversion |
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VREF = 4V, VCC = 4V |
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3 |
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LSB |
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ADC clock = 1 MHz |
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Noise Reduction mode |
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Single Ended Conversion |
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Integral Non-linearity (INL) |
VREF = 4V, VCC = 4V |
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1 |
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LSB |
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ADC clock = 200 kHz |
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Single Ended Conversion |
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Differential Non-linearity (DNL) |
VREF = 4V, VCC = 4V |
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0.5 |
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LSB |
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ADC clock = 200 kHz |
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Single Ended Conversion |
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Gain Error |
VREF = 4V, VCC = 4V |
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1 |
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LSB |
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ADC clock = 200 kHz |
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Single Ended Conversion |
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Offset Error |
VREF = 4V, VCC = 4V |
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LSB |
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ADC clock = 200 kHz |
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Conversion Time |
Free Running Conversion |
13 |
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260 |
µs |
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Clock Frequency |
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50 |
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1000 |
kHz |
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AVCC |
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Analog Supply Voltage |
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VCC - 0.3(2) |
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VCC + 0.3(3) |
V |
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VREF |
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Reference Voltage |
Single Ended Conversion |
2.0 |
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AVCC |
V |
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Differential Conversion |
2.0 |
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AVCC - 0.2 |
V |
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Input voltage |
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Single ended channels |
GND |
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VREF |
V |
VIN |
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Differential channels |
0 |
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VREF |
V |
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Input bandwidth |
Single ended channels |
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38.5 |
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kHz |
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Differential channels |
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4 |
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kHz |
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297
2466P–AVR–08/07
Table 122. ADC Characteristics (Continued)
Symbol |
Parameter |
Condition |
Min(1) |
Typ(1) |
Max(1) |
Units |
VINT |
Internal Voltage Reference |
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2.3 |
2.6 |
2.9 |
V |
RREF |
Reference Input Resistance |
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32 |
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kΩ |
RAIN |
Analog Input Resistance |
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100 |
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MΩ |
Notes: 1. |
Values are guidelines only. |
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2.Minimum for AVCC is 2.7V.
3.Maximum for AVCC is 5.5V.
298 ATmega16(L) 
2466P–AVR–08/07
ATmega16(L)
ATmega16
Typical
Characteristics
The following charts show typical behavior. These figures are not tested during manufacturing. All current consumption measurements are performed with all I/O pins configured as inputs and with internal pull-ups enabled. A sine wave generator with rail-to-rail output is used as clock source.
The power consumption in Power-down mode is independent of clock selection.
The current consumption is a function of several factors such as: operating voltage, operating frequency, loading of I/O pins, switching rate of I/O pins, code executed and ambient temperature. The dominating factors are operating voltage and frequency.
The current drawn from capacitive loaded pins may be estimated (for one pin) as CL*VCC*f where CL = load capacitance, VCC = operating voltage and f = average switching frequency of I/O pin.
The parts are characterized at frequencies higher than test limits. Parts are not guaranteed to function properly at frequencies higher than the ordering code indicates.
The difference between current consumption in Power-down mode with Watchdog Timer enabled and Power-down mode with Watchdog Timer disabled represents the differential current drawn by the Watchdog Timer.
Active Supply Current Figure 149. Active Supply Current vs. Frequency (0.1 - 1.0 MHz
ICC (mA)
ACTIVE SUPPLY CURRENT vs. FREQUENCY
0.1 - 1.0 MHz
2
5.5V
1.8 |
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5.0V |
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1.6 |
4.5V |
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1.4 |
4.0V |
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1.2 |
3.6V |
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3.3V |
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1 |
3.0V |
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2.7V |
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0.8 |
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0.6
0.4
0.2
0
0 |
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
1 |
Frequency (MHz)
299
2466P–AVR–08/07
Figure 150. Active Supply Current vs. Frequency (1 - 20 MHz)
ICC (mA)
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ACTIVE SUPPLY CURRENT vs. FREQUENCY |
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1 - 20 MHz |
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35 |
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30 |
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5.5V |
25 |
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5.0V |
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4.5V |
20 |
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15 |
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4.0V |
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10 |
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3.6V |
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3.3V |
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5 |
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3.0V |
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2.7V |
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0 |
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0 |
2 |
4 |
6 |
8 |
10 |
12 |
14 |
16 |
18 |
20 |
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Frequency (MHz) |
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Figure 151. Active Supply Current vs. VCC (Internal RC Oscillator, 8 MHz)
ICC (mA)
ACTIVE SUPPLY CURRENT vs. VCC
INTERNAL RC OSCILLATOR, 8 MHz
16
-40°C 
25°C
14
85°C
12
10
8
6
4
2
0
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
VCC (V)
300 ATmega16(L)
2466P–AVR–08/07
ATmega16(L)
Figure 152. Active Supply Current vs. VCC (Internal RC Oscillator, 4 MHz)
ICC (mA)
ACTIVE SUPPLY CURRENT vs. VCC
INTERNAL RC OSCILLATOR, 4 MHz
9
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25°C |
-40°C |
8 |
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7
85°C
6
5
4
3
2
1
0
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
VCC (V)
Figure 153. Active Supply Current vs. VCC (Internal RC Oscillator, 2 MHz)
ICC (mA)
ACTIVE SUPPLY CURRENT vs. VCC
INTERNAL RC OSCILLATOR, 2 MHz
4.5
4 |
25°C |
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85°C |
3.5
-40°C
3
2.5
2
1.5
1
0.5
0
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
VCC (V)
301
2466P–AVR–08/07
Figure 154. Active Supply Current vs. VCC (Internal RC Oscillator, 1 MHz)
ACTIVE SUPPLY CURRENT vs. VCC
INTERNAL RC OSCILLATOR, 1 MHz
2.5
85°C 
25°C
2
-40°C
1.5
ICC (mA)
1
0.5
0
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
VCC (V)
Figure 155. Active Supply Current vs. VCC (32 kHz External Oscillator)
ICC (uA)
ACTIVE SUPPLY CURRENT vs. VCC
32kHz EXTERNAL OSCILLATOR
180
85°C
160
25°C
140
120
100
80
60
40
20
0
2.5 |
3 |
3.5 |
4 |
4.5 |
5 |
5.5 |
VCC (V)
302 ATmega16(L)
2466P–AVR–08/07