ATmega8515 Atmel Corporation, ATmega8515 Datasheet - Page 36

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ATmega8515

Manufacturer Part Number
ATmega8515
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega8515

Flash (kbytes)
8 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
35
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
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
3
Input Capture Channels
1
Pwm Channels
3
32khz Rtc
No
Calibrated Rc Oscillator
Yes

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36
ATmega8515(L)
in use, the amount of stray capacitance, and the electromagnetic noise of the environ-
ment. Some initial guidelines for choosing capacitors for use with crystals are given in
Table 7. For ceramic resonators, the capacitor values given by the manufacturer should
be used.
Figure 19. Crystal Oscillator Connections
The Oscillator can operate in three different modes, each optimized for a specific fre-
quency range. The operating mode is selected by the fuses CKSEL3..1 as shown in
Table 7.
Table 7. Crystal Oscillator Operating Modes
Note:
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown
in Table 8.
Table 8. Start-up Times for the Crystal Oscillator Clock Selection
CKOPT
CKSEL0
1
1
1
0
0
0
0
0
1
1. This option should not be used with crystals, only with ceramic resonators.
101, 110, 111
SUT1..0
CKSEL3..1
00
01
10
11
00
101
110
111
(1)
from Power-down
Start-up Time
258 CK
258 CK
1K CK
1K CK
1K CK
Frequency Range
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
(2)
(2)
(2)
(MHz)
(1)
(1)
1.0 ≤
C2
C1
Additional Delay from
Reset (V
Recommended Range for Capacitors
C1 and C2 for Use with Crystals (pF)
4.1 ms
4.1 ms
65 ms
65 ms
CC
XTAL2
XTAL1
GND
= 5.0V)
12 - 22
12 - 22
12 - 22
Recommended
Usage
Ceramic resonator,
fast rising power
Ceramic resonator,
slowly rising power
Ceramic resonator,
BOD enabled
Ceramic resonator,
fast rising power
Ceramic resonator,
slowly rising power
2512K–AVR–01/10

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