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ATmega325P 데이터시트(PDF) 292 Page - ATMEL Corporation

부품명 ATmega325P
상세설명  8-bit Microcontroller with 32K Bytes In-System Programmable Flash
PDF  364 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega325P 데이터시트(HTML) 292 Page - ATMEL Corporation

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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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