ATTINY25V-10MUR Atmel, ATTINY25V-10MUR Datasheet - Page 30
![MCU AVR 2KB FLASH 10MHZ 20QFN](/photos/6/87/68751/313-20-qfn_sml.jpg)
ATTINY25V-10MUR
Manufacturer Part Number
ATTINY25V-10MUR
Description
MCU AVR 2KB FLASH 10MHZ 20QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY25-20MU.pdf
(236 pages)
Specifications of ATTINY25V-10MUR
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
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
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
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6.2.6
30
ATtiny25/45/85
Crystal Oscillator / Ceramic Resonator
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
ceramic resonator may be used.
Figure 6-5.
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
given by the manufacturer should be used.
Table 6-12.
Notes:
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL[3:1] as shown in
The CKSEL0 Fuse together with the SUT[1:0] Fuses select the start-up times as shown in
6-13.
Table 6-13.
CKSEL[3:1]
CKSEL0
100
0
0
0
101
110
111
(1)
1. This option should not be used with crystals, only with ceramic resonators.
SUT[1:0]
Crystal Oscillator Connections
Crystal Oscillator Operating Modes
Start-up Times for the Crystal Oscillator Clock Selection
00
01
10
Frequency Range (MHz)
Start-up Time from
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
1K (1024) CK
Power-down
8.0 -
Table 6-12
258 CK
258 CK
(1)
(1)
C2
C1
(2)
below. For ceramic resonators, the capacitor values
Additional Delay
Recommended Range for Capacitors C1 and
14CK + 64 ms
14CK + 4 ms
from Reset
XTAL2
XTAL1
GND
Figure
14CK
C2 for Use with Crystals (pF)
6-5. Either a quartz crystal or a
12 - 22
12 - 22
12 - 22
Ceramic resonator,
fast rising power
Ceramic resonator,
slowly rising power
Ceramic resonator,
BOD enabled
Recommended Usage
–
Table
2586M–AVR–07/10
6-12.
Table
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