ATMEGA324P-15MZ Atmel, ATMEGA324P-15MZ Datasheet - Page 32
ATMEGA324P-15MZ
Manufacturer Part Number
ATMEGA324P-15MZ
Description
MCU AVR 32K FLASH 15MHZ 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA324P-15MZ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
44-VQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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7.3
32
Low Power Crystal Oscillator
ATmega164P/324P/644P
Figure 7-2.
This Crystal Oscillator is a low power oscillator, with reduced voltage swing on the XTAL2 out-
put. It gives the lowest power consumption, but is not capable of driving other clock inputs, and
may be more susceptible to noise in noisy environments. In these cases, refer to the
Crystal Oscillator” on page
Some initial guidelines for choosing capacitors for use with crystals are given in
crystal should be connected as described in
The Low Power 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 7-3.
Notes:
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in
7-4.
Frequency Range
1. The frequency ranges are preliminary values. Actual values are TBD.
2. This option should not be used with crystals, only with ceramic resonators.
3. If 8 MHz frequency exceeds the specification of the device (depends on V
Fuse can be programmed in order to divide the internal frequency by 8. It must be ensured
that the resulting divided clock meets the frequency specification of the device.
8.0 - 16.0
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
Crystal Oscillator Connections
Low Power Crystal Oscillator Operating Modes
(1)
(MHz)
33.
C2
C1
CKSEL3..1
100
101
110
111
“Clock Source Connections” on page
(2)
Recommended Range for Capacitors C1
XTAL2
XTAL1
GND
(3)
and C2 (pF)
12 - 22
12 - 22
12 - 22
–
CC
), the CKDIV8
Table
31.
7674F–AVR–09/09
Table
“Full Swing
7-3. The
Table
7-3.
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