ATmega128 datasheet(313/386 Pages) ATMEL

Part #	ATmega128

Description	8-bit Microcontroller with 128K Bytes In-System Programmable Flash

PDF	386 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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313 / 386 page

313

2467S–AVR–07/09

ATmega128

Figure 149. State Machine Sequence for Changing/Reading the Data Word

Virtual Flash Page

Load Register

The Virtual Flash Page Load Register is a virtual scan chain with length equal to the number of

bits in one Flash page. Internally the Shift Register is 8-bit, and the data are automatically trans-

ferred to the Flash page buffer byte by byte. Shift in all instruction words in the page, starting

with the LSB of the first instruction in the page and ending with the MSB of the last instruction in

the page. This provides an efficient way to load the entire Flash page buffer before executing

Page Write.

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

ATmega128 Datasheet(PDF) 313 Page - ATMEL Corporation