ATmega64A datasheet(315/392 Pages) ATMEL

tên linh kiện	ATmega64A

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 64K Bytes In-System Programmable Flash

PDF	392 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

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8160C–AVR–07/09

ATmega64A

Figure 27-12. State Machine Sequence for Changing the Instruction Word

27.9.2

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.

27.9.3

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.

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

ATmega64A bảng dữ liệu(PDF) 315 Page - ATMEL Corporation