Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 273)

273

ATmega169V/L

2514A–AVR–08/02

Figure 119. Addressing the Flash Which is Organized in Pages

(1)

Note: 1. PCPAGE and PCWORD are listed in Table 125 on page 270.

Figure 120. Programming the Flash Waveforms

(1)

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

Programming the EEPROM The EEPROM is organized in pages, see Table 126 on page 270. When programming

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

data to be programmed simultaneously. The programming algorithm for the EEPROM

data memory is as follows (refer to “Programming the Flash” on page 271 for details on

Command, Address and Data loading):

1. A: Load Command “0001 0001”.

2. G: Load Address High Byte (0x00 - 0xFF).

3. B: Load Address Low Byte (0x00 - 0xFF).

4. C: Load Data (0x00 - 0xFF).

5. E: Latch data (give PAGEL a positive pulse).

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

RDY/BSY

RESET +12V

PAGEL

BS2

0x10 ADDR. LOW

ADDR. HIGH

DATA

DATA L OW DATA H I G H

ADDR. LOW DATA LOW DATA HIGH

XA1

XA0

BS1

XTAL1

XX XX

ABCDEBC DEGH

1 2 ... 268 269 270 271 272 273 274 275 276 277 278 ... 316 317

Commentaires sur ces manuels

Pas de commentaire

Rainbow-electronics Atmega169L Manuel d'utilisateur Page 273

Commentaires sur ces manuels

Produits connexes et manuels pour Capteurs Rainbow-electronics Atmega169L