ATMEGA88-20MUR Atmel, ATMEGA88-20MUR Datasheet - Page 247
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ATMEGA88-20MUR
Manufacturer Part Number
ATMEGA88-20MUR
Description
MCU AVR 8K FLASH 20MHZ 32QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88-20MUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Cpu Family
ATmega
Device Core
AVR
Device Core Size
8b
Frequency (max)
20MHz
Interface Type
SPI/TWI/USART
Total Internal Ram Size
1KB
# I/os (max)
23
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
32
Package Type
MLF EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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2545S–AVR–07/10
In Free Running mode, a new conversion will be started immediately after the conversion com-
pletes, while ADSC remains high. For a summary of conversion times, see
248.
Figure 23-4. ADC Timing Diagram, First Conversion (Single Conversion Mode)
Figure 23-5. ADC Timing Diagram, Single Conversion
Figure 23-6. ADC Timing Diagram, Auto Triggered Conversion
Cycle Number
ADC Clock
Trigger
Source
ADATE
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
ADEN
ADSC
ADIF
ADCH
ADCL
Prescaler
Reset
1
1
2
MUX and REFS
Update
MUX and REFS
Update
1
2
MUX and REFS
Update
12
2
3
13
Sample & Hold
3
4
Sample &
Hold
14
4
5
15
5
6
Sample & Hold
16
6
First Conversion
17
7
One Conversion
18
7
8
One Conversion
19
8
9
20
9
10
Conversion
Complete
21
10
Conversion
11
Complete
22
Conversion
ATmega48/88/168
Complete
11
23
12
24
12
13
25
13
Sign and MSB of Result
Sign and MSB of Result
LSB of Result
Table 23-1 on page
Next Conversion
Sign and MSB of Result
1
Next
Conversion
1
LSB of Result
LSB of Result
2
2
MUX and REFS
Update
Next Conversion
MUX and REFS
Update
1
Prescaler
Reset
3
3
2
247
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