| 전자부품 데이터시트 검색엔진 |
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ATtiny261A 데이터시트(PDF) 176 Page - ATMEL Corporation |
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ATtiny261A 데이터시트(HTML) 176 Page - ATMEL Corporation |
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176 / 292 page ![]() 176 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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