Rainbow-electronics ATtiny26L Manual do Utilizador descarregar pdf (Página 113)

113

ATtiny26(L)

1477B–AVR–04/02

F. Load Address High byte

1. Set XA1, XA0 to “00”. This enables address loading.

2. Set BS1 to “1”. This selects high address.

3. Set DATA = Address high byte ($00 - $03).

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

G. Program Page

1. Set BS1 to “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 60 for signal waveforms.)

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

programmed.

I. End Page Programming

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 59. Addressing the Flash which is Organized in Pages

(1)

Note: 1. PCPAGE and PCWORD are listed in Table 55 on page 110.

PROGRAM MEMORY

WORD ADDRESS

WITHIN A PAGE

PAGE ADDRESS

WITHIN THE FLASH

INSTRUCTION WORD

PAG E

PCWORD[PAGEMSB:0]:

PAGEEND

PAG E

PCWORDPCPAGE

PCMSB

PAGEMSB

PROGRAM

COUNTER

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 150 151

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Rainbow-electronics ATtiny26L Manual do Utilizador Página 113