ATTINY2313A-SUR Atmel, ATTINY2313A-SUR Datasheet - Page 197

• Manufacturer Part Number: ATTINY2313A-SUR
• Description: MCU AVR 2KB FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313A-SUR

• 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: 18
• 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): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

21.4
21.4.1
Table 21-1.
21.4.2
Table 21-2.
8246A–AVR–11/09
Calibration
Method
Factory
Calibration
User
Calibration
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Clock Characteristics
Calibrated Internal RC Oscillator Accuracy
External Clock Drive
Parameter
Clock Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one clock cycle to the next
Calibration Accuracy of Internal RC Oscillator
External Clock Drive
Fixed frequency within:
Target Frequency
It is possible to manually calibrate the internal oscillator to be more accurate than default factory
calibration. Note that the oscillator frequency depends on temperature and voltage. Voltage and
temperature characteristics can be found in
page
3.1 – 4.7 MHz /
Notes:
Figure 21-2. External Clock Drive Waveform
7.3 – 9.1MHz
4.0 / 8.0MHz
227.
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
V
IL1
V
IH1
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
V
Min.
250
100
100
CC
0
= 1.8 - 5.5V
Max.
2.0
2.0
4
2
Figure 22-46 on page
Fixed temperature
Temperature
-40°C – 85°C
V
within:
Min.
25°C
100
CC
40
40
0
= 2.7 - 5.5V
Max.
1.6
1.6
10
2
226, and
Accuracy at given Voltage
V
Min.
CC
50
20
20
0
& Temperature
= 4.5 - 5.5V
Figure 22-47 on
±10%
±2%
Max.
0.5
0.5
20
2
(1)
Units
MHz
ns
ns
ns
µs
µs
%
197