ATmega324P Automotive Atmel Corporation, ATmega324P Automotive Datasheet - Page 51

• Manufacturer Part Number: ATmega324P Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega324P Automotive

• Flash (kbytes): 32 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: 32
• Ext Interrupts: 32
• Usb Speed: No
• Usb Interface: No
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

9.0.4
7674F–AVR–09/09
External Reset
Figure 1. MCU Start-up, RESET Tied to V
Figure 2. MCU Start-up, RESET Extended Externally
Table 1. Power On Reset Specifications
Note:
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset.
When the applied signal reaches the Reset Threshold Voltage – V
delay counter starts the MCU after the Time-out period – t
INTERNAL
TIME-OUT
Symbol
V
V
V
V
POT
PORMAX
PORMIN
CCRR
RESET
INTERNAL
V
RESET
TIME-OUT
CC
V
RESET
CC
RESET
1. Before rising, the supply has to be between
V
CCRR
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
VCC Max. start voltage to ensure internal
Power-on Reset signal
VCC Min. start voltage to ensure internal
Power-on Reset signal
VCC Rise Rate to ensure Power-on Reset
V
V
V
RST
PORMA X
“System and Reset Characteristics” on page
PORMIN
t
TOUT
CC
V
RST
ATmega164P/324P/644P
t
TOUT
V
PORMIN
(1)
TOUT
and V
– has expired.
0.01
Min
-0.1
1.1
0.8
PORMAX
RST
– on its positive edge, the
Typ
1.4
1.3
to ensure a Reset.
332) will generate a
Max
1.7
1.6
0.4
Units
V/ms
V
V
V
V
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