Rainbow-electronics ATmega128L Manual do Utilizador descarregar pdf (Página 286)

100

101

286

ATmega128(L)

2467B–09/01

H. Program Page

1. Set BS1 = “0”

2. Give WR a negative pulse. This starts programming of the entire page of data.

RDY/BSY

goes low.

3. 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. 1. Set XA1, XA0 to '10'. This enables command loading.

2. Set DATA to '0000 0000'. This is the command for No Operation.

3. Give XTAL1 a positive pulse. This loads the command, and the internal write sig-

nals are reset.

Figure 136. Addressing the Flash which is Organized in Pages

Note: 1. PCPAGE and PCWORD are listed in Table 125 on page 284.

PROGRAM MEMORY

WORD ADDRESS

WITHIN A PAGE

PAGE ADDRESS

WITHIN THE FLASH

INSTRUCTION WORD

PAGE

PCWORD[PAGEMSB:0]:

PAGEEND

PAGE

PCWORDPCPAGE

PCMSB

PAGEMSB

PROGRAM

COUNTER

1 2 ... 281 282 283 284 285 286 287 288 289 290 291 ... 330 331

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