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ATMEGA16 데이터시트(PDF) 273 Page - ATMEL Corporation

부품명 ATMEGA16
상세설명  8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash
PDF  315 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATMEGA16 데이터시트(HTML) 273 Page - ATMEL Corporation

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273
ATmega16(L)
2466E–AVR–10/02
Figure 138. State Machine Sequence for Changing the Instruction Word
AVR_RESET ($C)
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.
PROG_ENABLE ($4)
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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