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AT90USB82 Datasheet(PDF) 248 Page - ATMEL Corporation

Part # AT90USB82
Description  8-bit Microcontroller with 8/16K Bytes of ISP Flash
PDF  306 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90USB82 Datasheet(HTML) 248 Page - ATMEL Corporation

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248
7707D–AVR–07/08
AT90USB82/162
Table 25-8.
Pin Values Used to Enter Programming Mode
Pin
Symbol
Value
PAGEL
Prog_enable[3]
0
XA1
Prog_enable[2]
0
XA0
Prog_enable[1]
0
BS1
Prog_enable[0]
0
Table 25-9.
XA1 and XA0 Encoding
XA1
XA0
Action when XTAL1 is Pulsed
00
Load Flash or EEPROM Address (High or low address byte determined
by BS2 and BS1).
0
1
Load Data (High or Low data byte for Flash determined by BS1).
1
0
Load Command
1
1
No Action, Idle
Table 25-10. Command Byte Bit Encoding
Command Byte
Command Executed
1000 0000
Chip Erase
0100 0000
Write Fuse bits
0010 0000
Write Lock bits
0001 0000
Write Flash
0001 0001
Write EEPROM
0000 1000
Read Signature Bytes and Calibration byte
0000 0100
Read Fuse and Lock bits
0000 0010
Read Flash
0000 0011
Read EEPROM
Table 25-11. No. of Words in a Page and No. of Pages in the Flash
Flash Size
Page Size
PCWORD
No. of
Pages
PCPAGE
PCMSB
4/8K words (8/16Kbytes)
64 words
PC[5:0]
128
PC[12:6]
12
Table 25-12. No. of Bytes in a Page and No. of Pages in the EEPROM
EEPROM Size
Page Size
PCWORD
No. of
Pages
PCPAGE
EEAMSB
512 bytes
4 bytes
EEA[1:0]
128
EEA[8:2]
8



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