ATmega1284P datasheet(299/380 Pages) ATMEL

299 / 380 page

299

8059D–AVR–11/09

ATmega1284P

K. 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 25-2. Addressing the Flash Which is Organized in Pages

(1)

Note:

1. PCPAGE and PCWORD are listed in Table 25-7 on page 294.

Figure 25-3. Programming the Flash Waveforms

(1)

Note:

1. “XX” is don’t care. The letters refer to the programming description above.

25.7.5

Programming the EEPROM

The EEPROM is organized in pages, see Table 25-8 on page 294. When programming the

EEPROM, the program data is latched into a page buffer. This allows one page of data to be

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

RDY/BSY

RESET +12V

PAGEL

BS2

0x10

ADDR. LOW

ADDR. HIGH

DATA

DATA LOW

DATA HIGH

ADDR. LOW

DATA LOW

DATA HIGH

XA1

XA0

BS1

XTAL1

ADDR. EXT.H

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