ATmega16U4 Atmel Corporation, ATmega16U4 Datasheet - Page 21

• Manufacturer Part Number: ATmega16U4
• Manufacturer: Atmel Corporation

Specifications of ATmega16U4

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2.1
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

7618C–AVR–07/08
entry_flash_read_sig:
entry_flash_read_fuse:
entry_flash_fill_temp_buffer:
entry_flash_prg_page:
entry_flash_page_erase:
entry_lock_wr_bits:
RSEGBOOT
;*F************************************************************************
**
; NAME: flash_page_erase_and_write
;--------------------------------------------------------------------------
--
; PARAMS:
;--------------------------------------------------------------------------
--
; PURPOSE: This function can be called for the user appplication
; This function performs an erase operation of the selected target page and
; the launch the prog sequence of the same target page.
; This function allows to save the 256 bytes software temporary buffer in
; the application section
;**************************************************************************
**
flash_page_erase_and_write:
;*F************************************************************************
**
; NAME: flash_prg_page
;--------------------------------------------------------------------------
--
; PARAMS: R18:17:R16: The byte address of the page
;--------------------------------------------------------------------------
--
; PURPOSE:
JMP flash_page_erase_and_write
JMP
JMP
JMP
JMP
JMP
JMP
PUSH
RCALL flash_page_erase
POP
RCALL flash_prg_page
RET
flash_read_sig
flash_read_fuse
flash_fill_temp_buffer
flash_prg_page
flash_page_erase_public
lock_wr_bits
R18
R18
R18:17:R16: The byte address of the page
Launch the prog sequence of the target page
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