ATtiny25 Automotive Atmel Corporation, ATtiny25 Automotive Datasheet - Page 27
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ATtiny25 Automotive
Manufacturer Part Number
ATtiny25 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATTINY25_AUTOMOTIVE.pdf
(7 pages)
3.ATTINY25_AUTOMOTIVE.pdf
(196 pages)
Specifications of ATtiny25 Automotive
Flash (kbytes)
2 Kbytes
Pin Count
8
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
4
Hardware Qtouch Acquisition
No
Max I/o Pins
6
Ext Interrupts
6
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
4
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
0.12
Eeprom (bytes)
128
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
5
Pwm Channels
6
32khz Rtc
No
Calibrated Rc Oscillator
Yes
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATTINY25_AUTOMOTIVE PDF datasheet #2
- ATTINY25_AUTOMOTIVE PDF datasheet #3
- Current page: 27 of 225
- Download datasheet (4Mb)
7.4
7701E–AVR–02/11
Crystal Oscillator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier which can be
configured for use as an On-chip Oscillator, as shown in Figure 7-2. Either a quartz 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
values given by the manufacturer should be used.
Figure 7-2.
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
page
Table 7-3.
Notes:
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in
Table 7-4 on page
CKSEL3..1
100
101
110
111
27.
(1)
1. This option should not be used with crystals, only with ceramic resonators.
Crystal Oscillator Connections
Crystal Oscillator Operating Modes
28.
Frequency Range (MHz)
Atmel ATtiny24/44/84 [Preliminary]
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
8.0 -
Table 7-3 on page
C2
C1
Recommended Range for Capacitors C1 and
27. For ceramic resonators, the capacitor
XTAL2
XTAL1
GND
C2 for Use with Crystals (pF)
12 - 22
12 - 22
12 - 22
–
Table 7-3 on
27
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