ATmega128 datasheet(294/386 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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294 / 386 page

294

2467S–AVR–07/09

ATmega128

Set DATA = Address high byte ($00 - $FF).

Give XTAL1 a positive pulse. This loads the address high byte.

H. Program Page

Set BS1 = “0”

Give WR a negative pulse. This starts programming of the entire page of data. RDY/BSY

goes low.

Wait until RDY/BSY goes high. (See Figure 137 for signal waveforms)

I. Repeat B through H until the entire Flash is programmed or until all data has been

programmed.

J. End Page Programming

1. Set XA1, XA0 to “10”. This enables command loading.

Set DATA to “0000 0000”. This is the command for No Operation.

Give XTAL1 a positive pulse. This loads the command, and the internal write signals are

reset.

Figure 136. Addressing the Flash which is Organized in Pages

Note:

1. PCPAGE and PCWORD are listed in Table 124 on page 292.

PROGRAM MEMORY

WORD ADDRESS

WITHIN A PAGE

PAGE ADDRESS

WITHIN THE FLASH

INSTRUCTION WORD

PAGE

PCWORD[PAGEMSB:0]:

PAGEEND

PAGE

PCWORD

PCPAGE

PCMSB

PAGEMSB

PROGRAM

COUNTER

ATmega128 Datasheet(PDF) 294 Page - ATMEL Corporation