ATmega48A/PA/88A/PA/168A/PA/328/P

Detailed Description

Content of the device:

• core0: the core
• watchdog0: watchdog (WDG)
• int0: Low level interrupt (INT0)
• int1: Low level interrupt (INT1)
• portb: general purpose I/O port B (PORTB)
  • (portb,0..7): general purpose I/O pins (PB0..PB7)
  • (portb,pcic): pin-change interrupt controller
• portc: general purpose I/O port C (PORTC)
  • (portc,0..6): general purpose I/O pins (PC0..PC6)
  • (portb,pcic): pin-change interrupt controller
• portd: general purpose I/O port D (PORTD)
  • (portd,0..7): general purpose I/O pins (PD0..PD7)
  • (portd,pcic): pin-change interrupt controller
• counter0: 8-bit counter-timer
  • (counter0,prescaler): counter0/counter1 prescaler
  • (counter0,compare0): compare unit 0 of counter0
    • (counter0,compare0,pin): counter0 compare0 output (OC0A)
  • (counter0,compare1): compare unit 1 of counter0
    • (counter0,compare1,pin): counter0 compare1 output (OC0B)
  • (counter0,pin): external clock source (T0)
• counter1: 16-bit counter-timer
  • (counter1,prescaler): counter0/counter1 prescaler
  • (counter1,compare0): compare unit 0 of counter1
    • (counter1,compare0,pin): counter1 compare0 output (OC1A)
  • (counter1,compare1): compare unit 1 of counter1
    • (counter1,compare1,pin): counter1 compare1 output (OC1B)
  • (counter1,capture0): capture unit 0 of counter1
    • (counter1,capture0,pin): counter1 capture0 input (ICP1)
  • (counter1,pin): external clock source (T1)
• counter2: 8-bit counter-timer
  • (counter2,prescaler): counter0/counter1 prescaler
  • (counter2,compare0): compare unit 0 of counter0
    • (counter2,compare0,pin): counter0 compare0 output (OC0A)
  • (counter2,compare1): compare unit 1 of counter0
    • (counter2,compare1,pin): counter0 compare1 output (OC0B)
• spi0: Serial Peripheral Interface
  • (spi0,mosi): (MOSI)
  • (spi0,mosi): (MISO)
  • (spi0,sck): (SCK)
  • (spi0,ss): (SS)
• uart0: Universal Asynchronous Receiver Transmitter (USART0)
• twi0: 2-wire Serial Interface
• acmp0: analog Comparator
  • (pin,ain0): analog comparator positive input (AIN0)
  • (pin,ain1): analog comparator negative input (AIN1)
• adc0: 10-bit Analog to Digital Converter (ADC)
  • (pin,adc0..7): ADC inputs
• flash0: Flash memory
• eeprom0: EEPROM memory

Modules
	ATmega168(P)
	ATmega328(P)
	ATmega48(P)
	ATmega88(P)

Target device description
These definitions are computed by HWA from the target device name.
#define	HW_DEVICE_ATMEGAX8
#define	HW_DEVICE_RAM_START   0x0100

Fuse bytes
These definitions are computed by HWA from the target device name and the definitions provided by the user.
#define	HW_DEVICE_FUSE_EB
#define	HW_DEVICE_FUSE_HB
#define	HW_DEVICE_FUSE_LB

User-defineable symbols
Before including the device-specific header, the user can define these symbols to describe the configuration of the target device. HWA defines undefined symbols with factory values.
#define	HW_DEVICE_BOOTSECTION_SIZE   4096
#define	HW_DEVICE_CLK_SRC   rc_8MHz
#define	HW_DEVICE_CLK_SRC_HZ   8000000
#define	HW_DEVICE_STARTUP_DELAYS
#define	HW_DEVICE_CLOCK_OUTPUT   disabled
#define	HW_DEVICE_EXTERNAL_RESET   enabled
#define	HW_DEVICE_DEBUG_WIRE   disabled
#define	HW_DEVICE_SERIAL_PROGRAMMING   enabled
#define	HW_DEVICE_WATCHDOG_ALWAYS_ON   no
#define	HW_DEVICE_PRESERVE_EEPROM_THROUGH_CHIP_ERASE   no
#define	HW_DEVICE_BROWNOUT_DETECTION   off
#define	HW_DEVICE_BOOT   application

Macro Definition Documentation

HW_DEVICE_ATMEGAX8

#define HW_DEVICE_ATMEGAX8

Device family

HW_DEVICE_BOOT

#define HW_DEVICE_BOOT   application

Whether the device starts the bootloader (in the boot Flash) or the application.

HW_DEVICE_BOOTSECTION_SIZE

#define HW_DEVICE_BOOTSECTION_SIZE   4096

Size of the boot section in bytes: 512, 1024, 2048, or 4096

HW_DEVICE_BROWNOUT_DETECTION

#define HW_DEVICE_BROWNOUT_DETECTION   off

Brown-out detection level

off

1700_2000mV

2500_2900mV

4100_4500mV

HW_DEVICE_CLK_SRC

#define HW_DEVICE_CLK_SRC   rc_8MHz

How the device is clocked.

external

External source on pin CLKI

rc_128kHz

Internal RC oscillator (watchdog)

rc_8MHz

Internal RC oscillator

low_freq_xosc

Crystal/resonator oscillator between pins XTAL1 and XTAL2

low_power_xosc

Crystal/resonator oscillator between pins XTAL1 and XTAL2

full_swing_xosc

Crystal/resonator oscillator between pins XTAL1 and XTAL2

HW_DEVICE_CLK_SRC_HZ

#define HW_DEVICE_CLK_SRC_HZ   8000000

HW_DEVICE_CLOCK_OUTPUT

#define HW_DEVICE_CLOCK_OUTPUT   disabled

Whether the device outputs its clock

enabled

disabled

HW_DEVICE_DEBUG_WIRE

#define HW_DEVICE_DEBUG_WIRE   disabled

Whether the Debug Wire is operationnal

enabled

disabled

HW_DEVICE_EXTERNAL_RESET

#define HW_DEVICE_EXTERNAL_RESET   enabled

Whether the device can be reset via its RESET pin

enabled

disabled

HW_DEVICE_FUSE_EB

#define HW_DEVICE_FUSE_EB

Value:

  /* 0xF8 | */                                  \
  HW_DEVICE_FUSE_BODLEVEL

Computed value of the fuse extended byte. Default: 0xFF.

HW_DEVICE_FUSE_HB

#define HW_DEVICE_FUSE_HB

Value:

  HW_DEVICE_FUSE_RSTDISBL<<7 |                  \
  HW_DEVICE_FUSE_DWEN<<6 |                      \
  HW_DEVICE_FUSE_SPIEN<<5 |                     \
  HW_DEVICE_FUSE_WDTON<<4 |                     \
  HW_DEVICE_FUSE_EESAVE<<3 |                    \
  HW_DEVICE_FUSE_BOOTSZ<<1 |                    \
  HW_DEVICE_FUSE_BOOTRST

Computed value of the fuse high byte. Default: 0xD9.

HW_DEVICE_FUSE_LB

#define HW_DEVICE_FUSE_LB

Value:

  HW_DEVICE_FUSE_CKDIV8<<7 |                    \
  HW_DEVICE_FUSE_CKOUT<<6 |                     \
  HW_DEVICE_FUSE_SUT10<<4 |                     \
  HW_DEVICE_FUSE_CKSEL31<<1 |                   \
  HW_DEVICE_FUSE_CKSEL0

Computed value of the fuse low byte. Default: 0x62.

HW_DEVICE_PRESERVE_EEPROM_THROUGH_CHIP_ERASE

#define HW_DEVICE_PRESERVE_EEPROM_THROUGH_CHIP_ERASE   no

Whether the EEPROM memory is erased when a chip erase occurs

enabled

disabled

HW_DEVICE_RAM_START

#define HW_DEVICE_RAM_START   0x0100

Address of first RAM byte

HW_DEVICE_SERIAL_PROGRAMMING

#define HW_DEVICE_SERIAL_PROGRAMMING   enabled

Whether the device can be programmed via the SPI

enabled

disabled

HW_DEVICE_STARTUP_DELAYS

#define HW_DEVICE_STARTUP_DELAYS

Startup delays

Valid values depend on the clocking configuration.

4CK

4CK_4ms

4CK_64ms

6CK_14CK

6CK_14CK_4ms

6CK_14CK_64ms

258CK_14CK_4ms

258CK_14CK_64ms

1KCK_4ms

1KCK_64ms

1KCK_14CK

1KCK_14CK_4ms

1KCK_14CK_64ms

16KCK_14CK

16KCK_14CK_4ms

16KCK_14CK_64ms

32KCK_64ms

HW_DEVICE_WATCHDOG_ALWAYS_ON

#define HW_DEVICE_WATCHDOG_ALWAYS_ON   no

Whether the watchdog is always running

enabled

disabled