ATMEGA8515L-8MU Atmel, ATMEGA8515L-8MU Datasheet - Page 36

• Manufacturer Part Number: ATMEGA8515L-8MU
• Description: IC AVR MCU 8K 8MHZ 3V 44-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8515L-8MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• 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): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-VQFN Exposed Pad
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, USART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Minimum Operating Temperature: - 40 C
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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