ATTINY43U-SUR Atmel, ATTINY43U-SUR Datasheet - Page 157

• Manufacturer Part Number: ATTINY43U-SUR
• Description: MCU AVR 4KB FLASH 8MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY43U-SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.4
20.4.1
It is possible to manually calibrate the internal oscillator to be more accurate than default factory calibration. Please note
that the oscillator frequency depends on temperature and voltage.
Table 20-2.
Notes:
20.4.2
Figure 20-2. External Clock Drive Waveforms
Table 20-3.
8048B–AVR–03/09
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
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
Calibrated Internal Oscillator Accuracy
External Clock Drive
Calibration Accuracy of Internal Oscillator
External Clock Drive Characteristics
Parameter
Clock Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Period change from clock cycle to next
Fixed frequency within:
V
Target Frequency
IL1
7.3 - 8.1 MHz
V
8.0 MHz
IH1
Fixed voltage within:
1.8V - 5.5V
V
3V
CC
Min.
Fixed temperature within:
250
100
100
V
0
CC
= 1.8 - 5.5V
Temperature
-40°C - 85°C
25°C
Max.
2.0
2.0
4
2
Min.
125
V
50
50
0
CC
Accuracy at given Voltage
= 2.7 - 5.5V
& Temperature
Max.
1.6
1.6
8
2
±10%
±1%
Units
(1)
MHz
ns
ns
μs
μs
ns
%
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