Atmel AT90USB646-AU TQFP(64) Device

Adapters for Automated Programmers

Adapters for Manual Programmers

Adapters for Engineering Programmers

Last Updated: 05/18/2023

IMPORTANT: Buffer address range 0-FFFFh is for FLASH Memory and 10000h-107FFh isfor EEPROM Data Memory. Erase will clear the Configuration Bits.Due to parallel programming mode specifications device will only beverified from 4.5V to 5.5V.The Calibration Byte can be programmed into any address of Flash Memory and EEPROM memory.To make use of Calibration Byte under Device Configure set CALIBRATION to ENABLE then setCAL BYTE ADDRESS to set address 0h in the signature row high byte for 8.0MHz internal RC Oscillator Calibrationthen set CALIBRATION ADDRESS (any address within [0000h-107FFh]).You also can set the fuse from Fuse Low Byte Fuse High Byte and Extended Fuse Byteunder Device Configure menu. The fuses are mapped into the fuse bytes in the followingway. Fuse Low Byte: [Bit0:CKSEL0 Bit1:CKSEL1 Bit2:CKSEL2 Bit3:CKSEL3 Bit4:SUT0 Bit5:SUT1Bit6:CKOUT Bit7:CKDIV]; Fuse High Byte: [Bit0:BOOTRST Bit1:BOOTSZ0 Bit2:BOOTSZ1Bit3: EESAVE Bit4:WDTON Bit5:SPIEN Bit6:JTAGEN Bit7:OCDEN];Extended Fuse Byte: [Bit0:BODLEVEL0 Bit1:BODLEVEL0Bit2:BODLEVEL2 Bit3:HWBE].Please refer to the device specifications for detailed information.COMPARE operation will only verify data read from the device against data in the buffer.