ATMEGA328P-AU Atmel, ATMEGA328P-AU Datasheet - Page 12

MCU AVR 32K FLASH 32TQFP

ATMEGA328P-AU

Manufacturer Part Number
ATMEGA328P-AU
Description
MCU AVR 32K FLASH 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar

Specifications of ATMEGA328P-AU

Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
Processor Series
ATMEGA32x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
2-Wire, SPI, USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
23
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Cpu Family
ATmega
Device Core
AVR
Device Core Size
8b
Frequency (max)
20MHz
Total Internal Ram Size
2KB
# I/os (max)
23
Number Of Timers - General Purpose
3
Operating Supply Voltage (typ)
2.5/3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
1.8V
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
32
Package Type
TQFP
Controller Family/series
AVR MEGA
No. Of I/o's
23
Eeprom Memory Size
1KB
Ram Memory Size
2KB
Cpu Speed
20MHz
Rohs Compliant
Yes
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVR
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATMEGA328P-20AU
ATMEGA328P-20AU
Q3790246

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA328P-AU
Manufacturer:
KINGBRIGHT
Quantity:
37 000
Part Number:
ATMEGA328P-AU
Manufacturer:
ATMEL
Quantity:
1 250
Part Number:
ATMEGA328P-AU
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
ATMEGA328P-AU
Manufacturer:
AT
Quantity:
1 000
Part Number:
ATMEGA328P-AU
Manufacturer:
AT
Quantity:
400
Company:
Part Number:
ATMEGA328P-AU
Manufacturer:
ATMEL
Quantity:
35 000
Company:
Part Number:
ATMEGA328P-AU
Manufacturer:
ATMEL
Quantity:
99 800
Part Number:
ATMEGA328P-AU
Manufacturer:
Microchip Technology
Quantity:
33 072
Part Number:
ATMEGA328P-AU
Manufacturer:
ATMEL
Quantity:
9 000
Company:
Part Number:
ATMEGA328P-AU - MCU
Manufacturer:
ATMEL
Quantity:
4 800
Part Number:
ATMEGA328P-AUR
Manufacturer:
Atmel
Quantity:
10 000
Part Number:
ATMEGA328P-AUR
Manufacturer:
Microchip Technology
Quantity:
45 140
Part Number:
ATMEGA328P-AUR
Manufacturer:
ATMEL
Quantity:
9 000
6.4.1
6.5
8271C–AVR–08/10
Stack Pointer
The X-register, Y-register, and Z-register
The registers R26...R31 have some added functions to their general purpose usage. These reg-
isters are 16-bit address pointers for indirect addressing of the data space. The three indirect
address registers X, Y, and Z are defined as described in
Figure 6-3.
In the different addressing modes these address registers have functions as fixed displacement,
automatic increment, and automatic decrement (see the instruction set reference for details).
The Stack is mainly used for storing temporary data, for storing local variables and for storing
return addresses after interrupts and subroutine calls. Note that the Stack is implemented as
growing from higher to lower memory locations. The Stack Pointer Register always points to the
top of the Stack. The Stack Pointer points to the data SRAM Stack area where the Subroutine
and Interrupt Stacks are located. A Stack PUSH command will decrease the Stack Pointer.
The Stack in the data SRAM must be defined by the program before any subroutine calls are
executed or interrupts are enabled. Initial Stack Pointer value equals the last address of the
internal SRAM and the Stack Pointer must be set to point above start of the SRAM, see
3 on page
See
Table 6-1.
The AVR Stack Pointer is implemented as two 8-bit registers in the I/O space. The number of
bits actually used is implementation dependent. Note that the data space in some implementa-
tions of the AVR architecture is so small that only SPL is needed. In this case, the SPH Register
will not be present.
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
X-register
Y-register
Z-register
Instruction
PUSH
CALL
ICALL
RCALL
POP
RET
RETI
Table 6-1
18.
The X-, Y-, and Z-registers
Stack Pointer instructions
Stack pointer
Decremented by 1
Decremented by 2
Incremented by 1
Incremented by 2
for Stack Pointer details.
15
7
R27 (0x1B)
15
7
R29 (0x1D)
15
7
R31 (0x1F)
Description
Data is pushed onto the stack
Return address is pushed onto the stack with a subroutine call or
interrupt
Data is popped from the stack
Return address is popped from the stack with return from
subroutine or return from interrupt
XH
YH
ZH
0
0
0
7
R26 (0x1A)
7
R28 (0x1C)
7
R30 (0x1E)
Figure
6-3.
XL
YL
ZL
0
0
0
0
0
0
Table 7-
12

Related parts for ATMEGA328P-AU