ATmega8U2 Atmel Corporation, ATmega8U2 Datasheet - Page 20

• Manufacturer Part Number: ATmega8U2
• Manufacturer: Atmel Corporation

Specifications of ATmega8U2

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 20
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

10. Appendix-B
20
;*A************************************************************************
**
; $RCSfile: flash_boot_drv.s90,v $
;--------------------------------------------------------------------------
--
; Copyright (c) Atmel.
;--------------------------------------------------------------------------
--
; RELEASE:
; REVISION:
; FILE_CVSID:
;--------------------------------------------------------------------------
--
; PURPOSE:
; This file contains the low level driver for the flash access
;**************************************************************************
**
NAMEflash_drv(16)
;_____ I N C L U D E S
______________________________________________________
#define ASM_INCLUDE
#include "config.h"
;**************************************************************************
**
; This is the absolute table entry points for low level flash drivers
; This table defines the entry points that can be called
; from the application section to perform on-chip flash operations:
;
;
;
;
;
;
;
;
;
;
;
;
;
;
;**************************************************************************
**
ASEG FLASH_END-0x0001B
entry_flash_page_erase_and_write:
entry_flash_page_erase_and_write:
entry_flash_fill_temp_buffer:
entry_flash_prg_page:
entry_flash_page_erase:
R18:17:R16: The byte address of the page
data16 :
address:
R18:17:R16: The byte address of the page
R18:17:R16: The byte address of the page
$Name:
$Revision: 1.7 $
$Id: flash_boot_drv.s90,v 1.7 2005/10/03 15:50:12 $
R16/R17: word to load in the temporary buffer.
R18/R19: address of the word in the temp. buffer.
$
7618C–AVR–07/08