ATTINY2313A-MUR Atmel, ATTINY2313A-MUR Datasheet - Page 28

• Manufacturer Part Number: ATTINY2313A-MUR
• Description: MCU AVR 2K FLASH 20MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY2313A-MUR

• 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: -

6.2.5
28
ATtiny2313A/4313
Crystal Oscillator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which can be con-
figured for use as an On-chip Oscillator, as shown in
crystal or a ceramic resonator may be used.
C1 and C2 should always be equal for both crystals and resonators. The optimal value of the
capacitors depends on the crystal or resonator in use, the amount of stray capacitance, and the
electromagnetic noise of the environment. Some initial guidelines for choosing capacitors for
use with crystals are given in
ues given by the manufacturer should be used.
Figure 6-3.
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL3..1 as shown in
Table 6-6.
Note:
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in
6-7.
CKSEL3..1
100
101
110
111
(1)
1. This option should not be used with crystals, only with ceramic resonators.
Crystal Oscillator Connections
Crystal Oscillator Operating Modes
Frequency Range (MHz)
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
8.0 -
Table 6-6 on page
C2
C1
Recommended Range for Capacitors C1
28. For ceramic resonators, the capacitor val-
and C2 for Use with Crystals (pF)
Figure 6-3 on page
XTAL2
XTAL1
GND
12 - 22
12 - 22
12 - 22
–
28. Either a quartz
Table
8246A–AVR–11/09
6-6.
Table