Rainbow-electronics AT90S2313 Manuel d'utilisateur télécharger pdf (Page 64)

64

AT90S2313

0839I–AVR–06/02

The loaded command and address are retained in the device during programming. For

efficient programming, the following should be considered:

• The command needs only be loaded once when writing or reading multiple memory

locations.

• Address high byte needs only be loaded before programming a new 256-word page

in the Flash.

• Skip writing the data value $FF; that is, the contents of the entire Flash and

EEPROM after a Chip Erase.

These considerations also apply to EEPROM programming and Flash, EEPROM and

signature byte reading.

Figure 50. Programming the Flash

Figure 51. Programming the Flash (Continued)

$10 ADDR. HIGH ADDR. LOW DATA LOWDATA

XA1

XA0

BS

XTAL1

WR

RDY/BSY

RESET

OE

12V

DATA HIGH

DATA

XA1

XA0

BS

XTAL1

WR

RDY/BSY

RESET

+12V

OE

1 2 ... 59 60 61 62 63 64 65 66 67 68 69 ... 91 92

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