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ATtiny261A Scheda tecnica(PDF) 176 Page - ATMEL Corporation

Il numero della parte ATtiny261A
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  292 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny261A Scheda tecnica(HTML) 176 Page - ATMEL Corporation

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8197A–AVR–10/09
ATtiny261A/461A/861A
The XA1/XA0 pins determine the action executed when the XTAL1 pin is given a positive pulse.
The bit coding is shown in Table 18-14.
When pulsing WR or OE, the command loaded determines the action executed. The different
Commands are shown in Table 18-15.
Table 18-13. Pin Values Used to Enter Programming Mode
Pin
Symbol
Value
PAGEL/BS1
Prog_enable[3]
0
XA1/BS2
Prog_enable[2]
0
XA0
Prog_enable[1]
0
WR
Prog_enable[0]
0
Table 18-14. XA1 and XA0 Coding
XA1
XA0
Action when XTAL1 is Pulsed
0
0
Load Flash or EEPROM Address (High or low address byte determined by 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 18-15. Command Byte Bit Coding
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



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