ATmega328/P - Datasheets - Summary

8-bit AVR Microcontrollers
ATmega328/P
DATASHEET SUMMARY
Introduction
®
®
The Atmel picoPower ATmega328/P is a low-power CMOS 8-bit
microcontroller based on the AVR® enhanced RISC architecture. By
executing powerful instructions in a single clock cycle, the ATmega328/P
achieves throughputs close to 1MIPS per MHz. This empowers system
designer to optimize the device for power consumption versus processing
speed.
Feature
High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family
•
Advanced RISC Architecture
– 131 Powerful Instructions
– Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 20 MIPS Throughput at 20MHz
– On-chip 2-cycle Multiplier
•
High Endurance Non-volatile Memory Segments
– 32KBytes of In-System Self-Programmable Flash program
Memory
– 1KBytes EEPROM
– 2KBytes Internal SRAM
– Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
– Data Retention: 20 years at 85°C/100 years at 25°C(1)
– Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
– Programming Lock for Software Security
•
Atmel® QTouch® Library Support
– Capacitive Touch Buttons, Sliders and Wheels
– QTouch and QMatrix® Acquisition
– Up to 64 sense channels
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
•
•
•
•
•
•
•
Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
– Real Time Counter with Separate Oscillator
– Six PWM Channels
– 8-channel 10-bit ADC in TQFP and QFN/MLF package
• Temperature Measurement
– 6-channel 10-bit ADC in PDIP Package
• Temperature Measurement
– Two Master/Slave SPI Serial Interface
– One Programmable Serial USART
– One Byte-oriented 2-wire Serial Interface (Philips I2C compatible)
– Programmable Watchdog Timer with Separate On-chip Oscillator
– One On-chip Analog Comparator
– Interrupt and Wake-up on Pin Change
Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated Oscillator
– External and Internal Interrupt Sources
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and
Extended Standby
I/O and Packages
– 23 Programmable I/O Lines
– 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF
Operating Voltage:
– 1.8 - 5.5V
Temperature Range:
– -40°C to 105°C
Speed Grade:
– 0 - 4MHz @ 1.8 - 5.5V
– 0 - 10MHz @ 2.7 - 5.5V
– 0 - 20MHz @ 4.5 - 5.5V
Power Consumption at 1MHz, 1.8V, 25°C
– Active Mode: 0.2mA
– Power-down Mode: 0.1μA
– Power-save Mode: 0.75μA (Including 32kHz RTC)
Atmel ATmega328/P [DATASHEET]
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Table of Contents
Introduction......................................................................................................................1
Feature............................................................................................................................ 1
1. Description.................................................................................................................4
2. Configuration Summary............................................................................................. 5
3. Ordering Information .................................................................................................6
3.1.
3.2.
ATmega328 ................................................................................................................................. 6
ATmega328P ...............................................................................................................................7
4. Block Diagram........................................................................................................... 8
5. Pin Configurations..................................................................................................... 9
5.1.
5.2.
Pin-out.......................................................................................................................................... 9
Pin Descriptions..........................................................................................................................12
6. I/O Multiplexing........................................................................................................ 14
7. Resources................................................................................................................16
8. Data Retention.........................................................................................................17
9. About Code Examples............................................................................................. 18
10. Capacitive Touch Sensing....................................................................................... 19
10.1. QTouch Library........................................................................................................................... 19
11. Packaging Information............................................................................................. 20
11.1.
11.2.
11.3.
11.4.
32-pin 32A.................................................................................................................................. 20
32-pin 32M1-A............................................................................................................................21
28-pin 28M1................................................................................................................................22
28-pin 28P3................................................................................................................................ 23
1.
Description
The Atmel AVR® core combines a rich instruction set with 32 general purpose working registers. All the
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers
to be accessed in a single instruction executed in one clock cycle. The resulting architecture is more code
efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.
The ATmega328/P provides the following features: 32Kbytes of In-System Programmable Flash with
Read-While-Write capabilities, 1Kbytes EEPROM, 2Kbytes SRAM, 23 general purpose I/O lines, 32
general purpose working registers, Real Time Counter (RTC), three flexible Timer/Counters with compare
modes and PWM, 1 serial programmable USARTs , 1 byte-oriented 2-wire Serial Interface (I2C), a 6channel 10-bit ADC (8 channels in TQFP and QFN/MLF packages) , a programmable Watchdog Timer
with internal Oscillator, an SPI serial port, and six software selectable power saving modes. The Idle
mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to
continue functioning. The Power-down mode saves the register contents but freezes the Oscillator,
disabling all other chip functions until the next interrupt or hardware reset. In Power-save mode, the
asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the
device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except
asynchronous timer and ADC to minimize switching noise during ADC conversions. In Standby mode, the
crystal/resonator oscillator is running while the rest of the device is sleeping. This allows very fast start-up
combined with low power consumption. In Extended Standby mode, both the main oscillator and the
asynchronous timer continue to run.
Atmel offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels functionality
into AVR microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and
includes fully debounced reporting of touch keys and includes Adjacent Key Suppression® (AKS™)
technology for unambiguous detection of key events. The easy-to-use QTouch Suite toolchain allows you
to explore, develop and debug your own touch applications.
The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip ISP
Flash allows the program memory to be reprogrammed In-System through an SPI serial interface, by a
conventional nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core.
The Boot program can use any interface to download the application program in the Application Flash
memory. Software in the Boot Flash section will continue to run while the Application Flash section is
updated, providing true Read-While-Write operation. By combining an 8-bit RISC CPU with In-System
Self-Programmable Flash on a monolithic chip, the Atmel ATmega328/P is a powerful microcontroller that
provides a highly flexible and cost effective solution to many embedded control applications.
The ATmega328/P is supported with a full suite of program and system development tools including: C
Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators, and Evaluation kits.
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
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2.
Configuration Summary
Features
ATmega328/P
Pin Count
28/32
Flash (Bytes)
32K
SRAM (Bytes)
2K
EEPROM (Bytes)
1K
Interrupt Vector Size (instruction word/vector)
1/1/2
General Purpose I/O Lines
23
SPI
2
TWI (I2C)
1
USART
1
ADC
10-bit 15kSPS
ADC Channels
8
8-bit Timer/Counters
2
16-bit Timer/Counters
1
and support a real Read-While-Write Self-Programming mechanism. There is a separate Boot Loader
Section, and the SPM instruction can only execute from there. In , there is no Read-While-Write support
and no separate Boot Loader Section. The SPM instruction can execute from the entire Flash.
Atmel ATmega328/P [DATASHEET]
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3.
Ordering Information
3.1.
ATmega328
Speed [MHz](3)
Power Supply [V]
Ordering Code(2)
Package(1)
Operational Range
20
1.8 - 5.5
ATmega328-AU
ATmega328-AUR(5)
ATmega328-MMH(4)
ATmega328-MMHR(4)(5)
ATmega328-MU
ATmega328-MUR(5)
ATmega328-PU
32A
32A
28M1
28M1
32M1-A
32M1-A
28P3
Industrial
(-40°C to 85°C)
Note: 1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for
detailed ordering information and minimum quantities.
2. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances
(RoHS directive). Also Halide free and fully Green.
3. Please refer to Speed Grades for Speed vs. VCC
4. Tape & Reel.
5. NiPdAu Lead Finish.
Package Type
28M1
28-pad, 4 x 4 x 1.0 body, Lead Pitch 0.45mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/
MLF)
28P3
28-lead, 0.300” Wide, Plastic Dual Inline Package (PDIP)
32M1-A 32-pad, 5 x 5 x 1.0 body, Lead Pitch 0.50mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/
MLF)
32A
32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP)
Atmel ATmega328/P [DATASHEET]
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3.2.
ATmega328P
Speed [MHz](3)
Power Supply [V]
Ordering Code(2)
Package(1)
Operational Range
20
1.8 - 5.5
ATmega328P-AU
ATmega328P-AUR(5)
ATmega328P-MMH(4)
ATmega328P-MMHR(4)(5)
ATmega328P-MU
ATmega328P-MUR(5)
ATmega328P-PU
32A
32A
28M1
28M1
32M1-A
32M1-A
28P3
Industrial
(-40°C to 85°C)
ATmega328P-AN
ATmega328P-ANR(5)
ATmega328P-MN
ATmega328P-MNR(5)
ATmega328P-PN
32A
32A
32M1-A
32M1-A
28P3
Industrial
(-40°C to 105°C)
Note: 1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for
detailed ordering information and minimum quantities.
2. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances
(RoHS directive). Also Halide free and fully Green.
3. Please refer to Speed Grades for Speed vs. VCC
4. Tape & Reel.
5. NiPdAu Lead Finish.
Package Type
28M1
28-pad, 4 x 4 x 1.0 body, Lead Pitch 0.45mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/
MLF)
28P3
28-lead, 0.300” Wide, Plastic Dual Inline Package (PDIP)
32M1-A 32-pad, 5 x 5 x 1.0 body, Lead Pitch 0.50mm Quad Flat No-Lead/Micro Lead Frame Package (QFN/
MLF)
32A
32-lead, Thin (1.0mm) Plastic Quad Flat Package (TQFP)
Atmel ATmega328/P [DATASHEET]
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4.
Block Diagram
Figure 4-1. Block Diagram
SRAM
debugWire
CPU
OCD
Clock generation
XTAL1 /
TOSC1
XTAL2 /
TOSC2
32.768kHz
XOSC
8MHz
Calib RC
External
clock
16MHz LP
XOSC
VCC
128kHz int
osc
Power
Supervision
POR/BOD &
RESET
RESET
GND
ADC6,ADC7,PC[5:0]
AREF
ADC[7:0]
AREF
PD[7:0], PC[6:0], PB[7:0]
PD3, PD2
PCINT[23:0]
INT[1:0]
PB1, PB2
PD5
PB0
OC1A/B
T1
ICP1
PB3
PD3
OC2A
OC2B
NVM
programming
Power
management
and clock
control
Watchdog
Timer
ADC
EXTINT
FLASH
D
A
T
A
B
U
S
EEPROM
EEPROMIF
I/O
PORTS
I
N
/
O
U
T
PB[7:0]
PC[6:0]
PD[7:0]
GPIOR[2:0]
TC 0
D
A
T
A
B
U
S
(8-bit)
SPI 0
AC
Internal
Reference
USART 0
RxD0
TxD0
XCK0
PD0
PD1
PD4
TWI 0
SDA0
SCL0
PC4
PC5
T0
OC0A
OC0B
PD4
PD6
PD5
MISO0
MOSI0
SCK0
SS0
PB4
PB3
PB5
PB2
AIN0
AIN1
PD6
PD7
ADCMUX
ADC6, ADC7
PC[5:0]
TC 1
(16-bit)
TC 2
(8-bit async)
Atmel ATmega328/P [DATASHEET]
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5.
Pin Configurations
5.1.
Pin-out
Figure 5-1. 28-pin PDIP
(PCINT14/RESET) PC6
1
28
PC5 (ADC5/SCL/PCINT13)
(PCINT16/RXD) PD0
2
27
PC4 (ADC4/SDA/PCINT12)
(PCINT17/TXD) PD1
3
26
PC3 (ADC3/PCINT11)
(PCINT18/INT0) PD2
4
25
PC2 (ADC2/PCINT10)
(PCINT19/OC2B/INT1) PD3
5
24
PC1 (ADC1/PCINT9)
(PCINT20/XCK/T0) PD4
6
23
PC0 (ADC0/PCINT8)
VCC
7
22
GND
GND
8
21
AREF
(PCINT6/XTAL1/TOSC1) PB6
9
20
AVCC
(PCINT7/XTAL2/TOSC2) PB7
10
19
PB5 (SCK/PCINT5)
(PCINT21/OC0B/T1) PD5
11
18
PB4 (MISO/PCINT4)
(PCINT22/OC0A/AIN0) PD6
12
17
PB3 (MOSI/OC2A/PCINT3)
(PCINT23/AIN1) PD7
13
16
PB2 (SS/OC1B/PCINT2)
(PCINT0/CLKO/ICP1) PB0
14
15
PB1 (OC1A/PCINT1)
Power
Ground
Programming/debug
Digital
Analog
Crystal/Osc
Atmel ATmega328/P [DATASHEET]
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PD2 (INT0/PCINT18)
PD1 (TXD/PCINT17)
PD0 (RXD/PCINT16)
PC6 (RESET/PCINT14)
PC5 (ADC5/SCL/PCINT13)
PC4 (ADC4/SDA/PCINT12)
PC3 (ADC3/PCINT11)
28
27
26
25
24
23
22
Figure 5-2. 28-pin MLF Top View
Power
Ground
Programming/debug
Digital
Analog
Crystal/CLK
4
18
GND
(PCINT6/XTAL1/TOSC1) PB6
5
17
AREF
(PCINT7/XTAL2/TOSC2) PB7
6
16
AVCC
(PCINT21/OC0B/T1) PD5
7
15
PB5 (SCK/PCINT5)
(PCINT4/MISO) PB4
Bottom pad should be
soldered to ground
14
GND
(PCINT3/OC2A/MOSI) PB3
PC0 (ADC0/PCINT8)
13
19
(PCINT2/SS/OC1B) PB2
3
12
VCC
(PCINT1/OC1A) PB1
PC1 (ADC1/PCINT9)
11
20
10
2
(PCINT0/CLKO/ICP1) PB0
(PCINT20/XCK/T0) PD4
9
PC2 (ADC2/PCINT10)
(PCINT23/AIN1) PD7
21
8
1
(PCINT22/OC0A/AIN0) PD6
(PCINT19/OC2B/INT1) PD3
Atmel ATmega328/P [DATASHEET]
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PC6 (RESET/PCINT14)
PC5 (ADC5/SCL/PCINT13)
PC4 (ADC4/SDA/PCINT12)
29
28
27
Digital
Analog
Crystal/CLK
PC2 (ADC2/PCINT10)
PD0 (RXD/PCINT16)
30
Programming/debug
25
PD1 (TXD/PCINT17)
31
Ground
26
PD2 (INT0/PCINT18)
32
Power
PC3 (ADC3/PCINT11)
Figure 5-3. 32-pin TQFP Top View
GND
5
20
AREF
VCC
6
19
ADC6
(PCINT6/XTAL1/TOSC1) PB6
7
18
AVCC
(PCINT7/XTAL2/TOSC2) PB7
8
17
PB5 (SCK/PCINT5)
16
GND
(PCINT4/MISO) PB4
21
15
4
(PCINT3/OC2A/MOSI) PB3
VCC
14
ADC7
(PCINT2/SS/OC1B) PB2
22
13
3
(PCINT1/OC1A) PB1
GND
12
PC0 (ADC0/PCINT8)
(PCINT0/CLKO/ICP1) PB0
23
11
2
(PCINT23/AIN1) PD7
(PCINT20/XCK/T0) PD4
10
PC1 (ADC1/PCINT9)
(PCINT22/OC0A/AIN0) PD6
24
9
1
(PCINT21/OC0B/T1) PD5
(PCINT19/OC2B/INT1) PD3
Atmel ATmega328/P [DATASHEET]
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PD2 (INT0/PCINT18)
PD1 (TXD/PCINT17)
PD0 (RXD/PCINT16)
PC6 (RESET/PCINT14)
PC5 (ADC5/SCL/PCINT13)
PC4 (ADC4/SDA/PCINT12)
PC3 (ADC3/PCINT11)
PC2 (ADC2/PCINT10)
32
31
30
29
28
27
26
25
Figure 5-4. 32-pin MLF Top View
Power
Ground
Programming/debug
Digital
Analog
Crystal/CLK
GND
GND
5
20
AREF
VCC
6
19
ADC6
(PCINT6/XTAL1/TOSC1) PB6
7
18
AVCC
(PCINT7/XTAL2/TOSC2) PB7
8
17
PB5 (SCK/PCINT5)
16
21
15
4
(PCINT3/OC2A/MOSI) PB3
VCC
14
ADC7
(PCINT2/SS/OC1B) PB2
22
13
3
(PCINT1/OC1A) PB1
GND
12
PC0 (ADC0/PCINT8)
(PCINT0/CLKO/ICP1) PB0
23
11
2
(PCINT23/AIN1) PD7
(PCINT20/XCK/T0) PD4
10
PC1 (ADC1/PCINT9)
(PCINT22/OC0A/AIN0) PD6
24
9
1
(PCINT21/OC0B/T1) PD5
(PCINT19/OC2B/INT1) PD3
(PCINT4/MISO) PB4
Bottom pad should be
soldered to ground
5.2.
Pin Descriptions
5.2.1.
VCC
Digital supply voltage.
5.2.2.
GND
Ground.
5.2.3.
Port B (PB[7:0]) XTAL1/XTAL2/TOSC1/TOSC2
Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B
output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs,
Port B pins that are externally pulled low will source current if the pull-up resistors are activated. The Port
B pins are tri-stated when a reset condition becomes active, even if the clock is not running.
Depending on the clock selection fuse settings, PB6 can be used as input to the inverting Oscillator
amplifier and input to the internal clock operating circuit.
Atmel ATmega328/P [DATASHEET]
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Depending on the clock selection fuse settings, PB7 can be used as output from the inverting Oscillator
amplifier.
If the Internal Calibrated RC Oscillator is used as chip clock source, PB[7:6] is used as TOSC[2:1] input
for the Asynchronous Timer/Counter2 if the AS2 bit in ASSR is set.
5.2.4.
Port C (PC[5:0])
Port C is a 7-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The PC[5:0]
output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs,
Port C pins that are externally pulled low will source current if the pull-up resistors are activated. The Port
C pins are tri-stated when a reset condition becomes active, even if the clock is not running.
5.2.5.
PC6/RESET
If the RSTDISBL Fuse is programmed, PC6 is used as an I/O pin. Note that the electrical characteristics
of PC6 differ from those of the other pins of Port C.
If the RSTDISBL Fuse is unprogrammed, PC6 is used as a Reset input. A low level on this pin for longer
than the minimum pulse length will generate a Reset, even if the clock is not running. Shorter pulses are
not guaranteed to generate a Reset.
The various special features of Port C are elaborated in the Alternate Functions of Port C section.
5.2.6.
Port D (PD[7:0])
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port D
output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs,
Port D pins that are externally pulled low will source current if the pull-up resistors are activated. The Port
D pins are tri-stated when a reset condition becomes active, even if the clock is not running.
5.2.7.
AVCC
AVCC is the supply voltage pin for the A/D Converter, PC[3:0], and PE[3:2]. It should be externally
connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC through
a low-pass filter. Note that PC[6:4] use digital supply voltage, VCC.
5.2.8.
AREF
AREF is the analog reference pin for the A/D Converter.
5.2.9.
ADC[7:6] (TQFP and VFQFN Package Only)
In the TQFP and VFQFN package, ADC[7:6] serve as analog inputs to the A/D converter. These pins are
powered from the analog supply and serve as 10-bit ADC channels.
Atmel ATmega328/P [DATASHEET]
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6.
I/O Multiplexing
Each pin is by default controlled by the PORT as a general purpose I/O and alternatively it can be
assigned to one of the peripheral functions.
The following table describes the peripheral signals multiplexed to the PORT I/O pins.
Table 6-1. PORT Function Multiplexing
(32-pin
MLF/TQFP)
Pin#
(28-pin
MLF) Pin#
(28-pin
PIPD) Pin#
PAD
EXTINT PCINT
1
1
5
PD[3]
INT1
2
2
6
PD[4]
3
3
7
VCC
4
4
8
GND
5
-
-
VCC
6
-
-
GND
7
5
9
PB[6]
PCINT6
XTAL1/
TOSC1
8
6
10
PB[7]
PCINT7
XTAL2/
TOSC2
9
7
11
PD[5]
PCINT21
OC0B
10
8
12
PD[6]
PCINT22 AIN0
OC0A
11
9
13
PD[7]
PCINT23 AIN1
12
10
14
PB[0]
PCINT0
13
11
15
PB[1]
PCINT1
OC1A
14
12
16
PB[2]
PCINT2
OC1B
SS0
15
13
17
PB[3]
PCINT3
OC2A
MOSI0
16
14
18
PB[4]
PCINT4
MISO0
17
15
19
PB[5]
PCINT5
SCK0
18
16
20
AVCC
19
-
-
ADC6
20
17
21
AREF
21
18
22
GND
22
-
-
ADC7
23
19
13
PC[0]
PCINT8
ADC0
24
20
24
PC[1]
PCINT9
ADC1
25
21
25
PC[2]
PCINT10 ADC2
26
22
26
PC[3]
PCINT11 ADC3
27
23
27
PC[4]
PCINT12 ADC4
SDA0
28
24
28
PC[5]
PCINT13 ADC5
SCL0
29
25
1
PC[6]/
RESET
PCINT14
ADC/AC OSC
T/C #0 T/C
#1
PCINT19
OC2B
PCINT20
T0
CLKO
USART 0 I2C 0
SPI 0
XCK0
T1
ICP1
ADC6
ADC7
Atmel ATmega328/P [DATASHEET]
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(32-pin
MLF/TQFP)
Pin#
(28-pin
MLF) Pin#
(28-pin
PIPD) Pin#
PAD
EXTINT PCINT
30
26
2
PD[0]
PCINT16
RXD0
31
27
3
PD[1]
PCINT17
TXD0
32
28
4
PD[2]
INT0
ADC/AC OSC
T/C #0 T/C
#1
USART 0 I2C 0
SPI 0
PCINT18
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
15
7.
Resources
A comprehensive set of development tools, application notes, and datasheets are available for download
on http://www.atmel.com/avr.
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
16
8.
Data Retention
Reliability Qualification results show that the projected data retention failure rate is much less than 1 PPM
over 20 years at 85°C or 100 years at 25°C.
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
17
9.
About Code Examples
This documentation contains simple code examples that briefly show how to use various parts of the
device. These code examples assume that the part specific header file is included before compilation. Be
aware that not all C compiler vendors include bit definitions in the header files and interrupt handling in C
is compiler dependent. Confirm with the C compiler documentation for more details.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI” instructions
must be replaced with instructions that allow access to extended I/O. Typically “LDS” and “STS”
combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
18
10.
10.1.
Capacitive Touch Sensing
QTouch Library
®
®
The Atmel QTouch Library provides a simple to use solution to realize touch sensitive interfaces on
®
most Atmel AVR microcontrollers. The QTouch Library includes support for the Atmel QTouch and Atmel
®
QMatrix acquisition methods.
Touch sensing can be added to any application by linking the appropriate Atmel QTouch Library for the
AVR Microcontroller. This is done by using a simple set of APIs to define the touch channels and sensors,
and then calling the touch sensing API’s to retrieve the channel information and determine the touch
sensor states.
The QTouch Library is FREE and downloadable from the Atmel website at the following location: http://
www.atmel.com/technologies/touch/. For implementation details and other information, refer to the Atmel
QTouch Library User Guide - also available for download from the Atmel website.
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
19
11.
Packaging Information
11.1.
32-pin 32A
PIN 1 IDENTIFIER
PIN 1
e
B
E1
E
D1
D
C
0°~7°
L
A1
A2
A
COMMON DIMENSIONS
(Unit of measure = mm)
Notes:
1. This package conforms to JEDEC reference MS-026, Variation ABA.
2. Dimensions D1 and E1 do not include mold protrusion.
Allowable
protrusion is 0.25mm per side. Dimensions D1 and E1 are maximum
plastic body size dimensions including mold mismatch.
3. Lead coplanarity is 0.10mm maximum.
SYMBOL
MIN
NOM
MAX
A
–
–
1.20
A1
0.05
–
0.15
A2
0.95
1.00
1.05
D
8.75
9.00
9.25
D1
6.90
7.00
7.10
E
8.75
9.00
9.25
E1
6.90
7.00
7.10
–
0.45
–
0.20
–
0.75
B
0.30
C
0.09
L
0.45
e
NOTE
Note 2
Note 2
0.80 TYP
2010-10-20
TITLE
32A, 32-lead, 7 x 7mm body size, 1.0mm body thickness,
0.8mm lead pitch, thin profile plastic quad flat package (TQFP)
DRAWING NO.
REV.
32A
C
Atmel ATmega328/P [DATASHEET]
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20
11.2.
32-pin 32M1-A
D
D1
1
2
3
0
Pin 1 ID
E1
SIDE VIEW
E
TOP VIEW
A2
A3
A1
A
K
0.08 C
P
D2
1
2
3
Pin #1 Notch
(0.20 R)
NOM
MAX
0.80
0.90
1.00
A1
–
0.02
0.05
A2
–
0.65
1.00
A3
E2
K
b
MIN
A
SYMBOL
P
e
COMMON DIMENSIONS
(Unit of Measure = mm)
L
BOTTOM VIEW
0.20 REF
b
0.18
0.23
0.30
D
4.90
5.00
5.10
D1
4.70
4.75
4.80
D2
2.95
3.10
3.25
E
4.90
5.00
5.10
E1
4.70
4.75
4.80
E2
2.95
3.10
3.25
e
Note : JEDEC Standard MO-220, Fig
. 2 (Anvil Singulation), VHHD-2 .
NOTE
0.50 BSC
L
0.30
0.40
0.50
P
–
–
0
–
–
0.60
o
12
K
0.20
–
–
03/14/2014
32M1-A , 32-pad, 5 x 5 x 1.0mm Bod y, Lead Pitch 0.50mm ,
3.10mm Exposed P ad, Micro Lead Frame P a ckage (MLF)
32M1-A
Atmel ATmega328/P [DATASHEET]
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F
21
11.3.
28-pin 28M1
D
C
1
2
Pin 1 ID
3
E
SIDEVIEW
A1
TOP VIEW
A
K
y
D2
1
0.45
2
R 0.20
3
E2
b
L
e
0.4 Ref
(4x)
BOTTOM VIEW
Note: The ter mi na l #1 ID is a Laser -ma r ked Feat ur e .
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
A
A1
b
C
D
D2
E
E2
e
L
y
K
0.80
0.00
0.17
3.95
2.35
3.95
2.35
0.35
0.00
0.20
NOM
MAX
NOTE
0.90 1.00
0.02 0.05
0.22 0.27
0.20 REF
4.00 4.05
2.40 2.45
4.00 4.05
2.40 2.45
0.45
0.40 0.45
–
0.08
–
–
10/24/08
Package Drawing Contact:
packagedrawings@atmel.com
TITLE
28M1,28-pad,4 x 4 x 1.0mm Body, Lead Pitch 0.45mm,
2.4 x 2.4mm Exposed Pad, Thermally Enhanced
Plastic Very Thin Quad Flat No Lead Package (VQFN)
GPC
ZBV
DRAWING NO.
28M1
Atmel ATmega328/P [DATASHEET]
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REV.
B
22
11.4.
28-pin 28P3
D
PIN
1
E1
A
SEATING PLANE
L
B2
B1
A1
B
(4 PLACES)
0º ~ 15º
REF
e
E
C
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
eB
Note:
1. Dimensions D and E1 do not include mold Flash or Protrusion.
Mold Flash or Protrusion shall not exceed 0.25mm (0.010").
MIN
NOM
MAX
A
–
–
4.5724
A1
0.508
–
–
D
34.544
–
34.798
E
7.620
–
8.255
E1
7.112
–
7.493
B
0.381
–
0.533
B1
1.143
–
1.397
B2
0.762
–
1.143
L
3.175
–
3.429
C
0.203
–
0.356
eB
–
–
10.160
e
NOTE
Note 1
Note 1
2.540 TYP
09/28/01
2325 Orchard Parkway
San Jose, CA 95131
TITLE
28P3, 28-lead (0.300"/7.62mm Wide) Plastic Dual
Inline Package (PDIP)
DRAWING NO.
REV.
28P3
B
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
23
Atmel Corporation
©
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T: (+1)(408) 441.0311
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|
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2016 Atmel Corporation. / Rev.: Atmel-42735A-ATmega328/P_Datasheet_Summary-06/2016
®
®
®
Atmel , Atmel logo and combinations thereof, Enabling Unlimited Possibilities , AVR , and others are registered trademarks or trademarks of Atmel Corporation in
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