ATMEGA164P-15AZ Atmel, ATMEGA164P-15AZ Datasheet - Page 51

• Manufacturer Part Number: ATMEGA164P-15AZ
• Description: MCU AVR 16K FLASH 15MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA164P-15AZ

• 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: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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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