ATTINY20-SSU Atmel, ATTINY20-SSU Datasheet - Page 117

• Manufacturer Part Number: ATTINY20-SSU
• Description: MCU AVR 2KB FLASH 12MHZ 14SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY20-SSU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, TWI
• Maximum Clock Frequency: 12 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

8235B–AVR–04/11
this mode, the sample-and-hold takes place two ADC clock cycles after the rising edge on the
trigger source signal. Three additional CPU clock cycles are used for synchronization logic.
Figure 15-6. ADC Timing Diagram, Auto Triggered Conversion
In Free Running mode, a new conversion will be started immediately after the conversion com-
pletes, while ADSC remains high. See
Figure 15-7. ADC Timing Diagram, Free Running Conversion
Cycle Number
ADC Clock
Trigger
Source
ADATE
ADIF
ADCH
ADCL
Prescaler
Reset
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
MUX and REFS
Update
1
Conversion
Complete
2
One Conversion
12
3
Sample &
Hold
4
13
Figure
5
14
6
15-7.
7
One Conversion
Next Conversion
1
Sign and MSB of Result
LSB of Result
8
9
2
MUX and REFS
Update
10
Conversion
Complete
3
11
12
Sample & Hold
4
13
ATtiny20
Sign and MSB of Result
LSB of Result
Next Conversion
1
Prescaler
Reset
2
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