ATMEGA8515-16MUR Atmel, ATMEGA8515-16MUR Datasheet - Page 37

• Manufacturer Part Number: ATMEGA8515-16MUR
• Description: MCU AVR 8KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8515-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 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: -

Low-frequency Crystal
Oscillator
2512K–AVR–01/10
Table 8. Start-up Times for the Crystal Oscillator Clock Selection (Continued)
Notes:
To use a 32.768 kHz watch crystal as the clock source for the device, the Low-fre-
quency Crystal Oscillator must be selected by setting the CKSEL Fuses to “1001”. The
crystal should be connected as shown in Figure 19. By programming the CKOPT Fuse,
the user can enable internal capacitors on XTAL1 and XTAL2, thereby removing the
need for external capacitors. The internal capacitors have a nominal value of 36 pF.
When this Oscillator is selected, start-up times are determined by the SUT Fuses as
shown in Table 9.
Table 9. Start-up Times for the Low-frequency Crystal Oscillator Clock Selection
Note:
CKSEL0
SUT1..0
00
01
10
11
1
1
1
1. These options should only be used when not operating close to the maximum fre-
2. These options are intended for use with ceramic resonators and will ensure fre-
1. These options should only be used if frequency stability at start-up is not important
quency of the device, and only if frequency stability at start-up is not important for the
application. These options are not suitable for crystals.
quency stability at start-up. They can also be used with crystals when not operating
close to the maximum frequency of the device, and if frequency stability at start-up is
not important for the application.
for the application.
SUT1..0
from Power-down
Start-up Time
01
10
11
1K CK
1K CK
32K CK
from Power-down
(1)
(1)
Start-up Time
16K CK
16K CK
16K CK
Additional Delay from
Reset (V
4.1 ms
65 ms
65 ms
Additional Delay from
CC
Reset (V
Reserved
= 5.0V)
4.1 ms
65 ms
CC
–
= 5.0V)
Recommended Usage
enabled
ATmega8515(L)
Fast rising power or BOD
Slowly rising power
Stable frequency at start-up
Recommended
Usage
Crystal Oscillator,
BOD enabled
Crystal Oscillator, fast
rising power
Crystal Oscillator,
slowly rising power
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