ATMEGA329P-20MNR Atmel, ATMEGA329P-20MNR Datasheet - Page 59
ATMEGA329P-20MNR
Manufacturer Part Number
ATMEGA329P-20MNR
Description
MCU AVR 32K FLASH 20MHZ 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA329P-20MNR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
54
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 ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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12.2
12.3
12.3.1
8021G–AVR–03/11
Pin Change Interrupt Timing
Register Description
EICRA – External Interrupt Control Register A
An example of timing of a pin change interrupt is shown in
Figure 12-1. Pin Change Interrupt
The External Interrupt Control Register A contains control bits for interrupt sense control.
• Bit 1, 0 – ISC01, ISC00: Interrupt Sense Control 0 Bit 1 and Bit 0
The External Interrupt 0 is activated by the external pin INT0 if the SREG I-flag and the corre-
sponding interrupt mask are set. The level and edges on the external INT0 pin that activate the
interrupt are defined in
detecting edges. If edge or toggle interrupt is selected, pulses that last longer than one clock
period will generate an interrupt. Shorter pulses are not guaranteed to generate an interrupt. If
low level interrupt is selected, the low level must be held until the completion of the currently
executing instruction to generate an interrupt.
Bit
(0x69)
Read/Write
Initial Value
pcint_setflag
pcint_in_(n)
PCINT(n)
pcint_syn
pin_sync
pin_lat
PCINT(0)
PCIF
clk
clk
R
7
–
0
LE
Table 12-1 on page
pin_lat
R
6
–
0
D
Q
pin_sync
R
5
–
0
PCINT(0) in PCMSK(x)
R
4
–
0
60. The value on the INT0 pin is sampled before
pcint_in_(0)
0
x
R
clk
3
–
0
ATmega329P/3290P
Figure
R
2
–
0
pcint_syn
12-1.
ISC01
R/W
1
0
pcint_setflag
ISC00
R/W
0
0
PCIF
EICRA
59
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