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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATmega325P датащи(PDF) 292 Page - ATMEL Corporation |
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ATmega325P датащи(HTML) 292 Page - ATMEL Corporation |
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292 / 364 page  292 8023F–AVR–07/09 ATmega325P/3250P Figure 25-13. State Machine Sequence for Changing the Instruction Word 25.8.2 AVR_RESET (0xC) The AVR specific public JTAG instruction for setting the AVR device in the Reset mode or taking the device out from the Reset mode. The TAP controller is not reset by this instruction. The one bit Reset Register is selected as Data Register. Note that the reset will be active as long as there is a logic “one” in the Reset Chain. The output from this chain is not latched. The active states are: • Shift-DR: The Reset Register is shifted by the TCK input. 25.8.3 PROG_ENABLE (0x4) The AVR specific public JTAG instruction for enabling programming via the JTAG port. The 16- bit Programming Enable Register is selected as Data Register. The active states are the following: • Shift-DR: The programming enable signature is shifted into the Data Register. • Update-DR: The programming enable signature is compared to the correct value, and Programming mode is entered if the signature is valid. Test-Logic-Reset Run-Test/Idle Shift-DR Exit1-DR Pause-DR Exit2-DR Update-DR Select-IR Scan Capture-IR Shift-IR Exit1-IR Pause-IR Exit2-IR Update-IR Select-DR Scan Capture-DR 0 1 0 11 1 00 00 11 1 0 1 1 0 1 0 0 1 0 1 1 0 1 0 0 0 0 1 1 |
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