ATmega8515 Atmel Corporation, ATmega8515 Datasheet - Page 39
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
ATmega8515
Manufacturer Part Number
ATmega8515
Description
Manufacturer
Atmel Corporation
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA8515
Manufacturer:
ATMEL
Quantity:
5 510
Company:
Part Number:
ATMEGA8515
Manufacturer:
NS
Quantity:
5 510
Part Number:
ATMEGA8515
Manufacturer:
AT
Quantity:
20 000
Company:
Part Number:
ATmega8515-16AC
Manufacturer:
MOT
Quantity:
3 450
Part Number:
ATmega8515-16AC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega8515-16AI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATmega8515-16AU
Manufacturer:
ATMEL
Quantity:
4 500
Part Number:
ATmega8515-16AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
ATmega8515-16PU
Manufacturer:
AT
Quantity:
20 000
Calibrated Internal RC
Oscillator
Oscillator Calibration Register
– OSCCAL
2512K–AVR–01/10
The calibrated internal RC Oscillator provides a fixed 1.0, 2.0, 4.0, or 8.0 MHz clock. All
frequencies are nominal values at 5V and 25°C. This clock may be selected as the sys-
tem clock by programming the CKSEL Fuses as shown in Table 12. If selected, it will
operate with no external components. The CKOPT Fuse should always be unpro-
grammed when using this clock option. During reset, hardware loads the calibration byte
into the OSCCAL Register and thereby automatically calibrates the RC Oscillator. At 5V,
25°C, and 1.0 MHz Oscillator frequency selected, this calibration gives a frequency
within ± 3% of the nominal frequency. Using run-time calibration methods as described
in application notes available at www.atmel.com/avr it is possible to achieve ± 1% accu-
racy at any given V
the Watchdog Oscillator will still be used for the Watchdog Timer and for the Reset
Time-out. For more information on the pre-programmed calibration value, see the sec-
tion “Calibration Byte” on page 181.
Table 12. Internal Calibrated RC Oscillator Operating Modes
Note:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as
shown in Table 13. XTAL1 and XTAL2 should be left unconnected (NC).
Table 13. Start-up Times for the Internal Calibrated RC Oscillator Clock Selection
Note:
• Bits 7..0 – CAL7..0: Oscillator Calibration Value
Writing the calibration byte to this address will trim the internal Oscillator to remove pro-
cess variations from the Oscillator frequency. During Reset, the 1 MHz calibrated value
which is located in the signature row High Byte (address 0x00) is automatically loaded
into the OSCCAL Register. If the internal RC is used at other frequencies, the calibration
values must be loaded manually. This can be done by first reading the signature row by
a programmer, and then store the calibration values in the Flash or EEPROM. Then the
value can be read by software and loaded into the OSCCAL Register. When OSCCAL is
zero, the lowest available frequency is chosen. Writing non-zero values to this register
Bit
Read/Write
Initial Value
SUT1..0
10
00
01
11
(1)
1. The device is shipped with this option selected.
1. The device is shipped with this option selected.
CAL7
Start-up Time from
R/W
7
CKSEL3..0
Power-down
0001
CC
0010
0011
0100
6 CK
6 CK
6 CK
and Temperature. When this Oscillator is used as the chip clock,
CAL6
R/W
(1)
6
CAL5
R/W
5
Device Specific Calibration Value
CAL4
Additional Delay from
R/W
4
Reset (V
Reserved
4.1 ms
65 ms
CAL3
R/W
3
CC
–
= 5.0V)
Nominal Frequency (MHz)
CAL2
R/W
2
ATmega8515(L)
CAL1
BOD enabled
Fast rising power
Slowly rising power
R/W
1.0
2.0
4.0
8.0
Recommended Usage
1
CAL0
R/W
0
OSCCAL
39