ATTINY26L-8SI Atmel, ATTINY26L-8SI Datasheet - Page 100

• Manufacturer Part Number: ATTINY26L-8SI
• Description: IC AVR MCU 2K LV 8MHZ IND 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY26L-8SI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

100
ATtiny26(L)
Figure 56. Differential Measurement Range
Table 44. Correlation Between Input Voltage and Output Codes
Example:
ADMUX = 0xEB (ADC0 - ADC1, 20x gain, 2.56V reference, left adjusted result)
Voltage on ADC0 is 400 mV, voltage on ADC1 is 300 mV.
ADCR = 1024 * 20 * (400 - 300) / 2560 = 800 = 0x320
ADCL will thus read 0x00, and ADCH will read 0xC8. Writing zero to ADLAR right adjusts the
result: ADCL = 0x20, ADCH = 0x03.
V
V
V
...
V
V
V
ADCn
ADCm
ADCm
ADCm
ADCm
ADCm
+ (1023/1024) V
+ (1022/1024) V
+ (1/1024) V
+ V
REF
/GAIN
REF
Output Code
/GAIN
REF
REF
0x3FF
0x000
/GAIN
/GAIN
0
Read code
0x3FF
0x3FF
0x3FE
0x001
0x000
...
Corresponding decimal value
1023
1023
1022
...
1
0
V
REF
/GAIN Differential Input
Voltage (Volts)
1477K–AVR–08/10