Rainbow Electronics AT90S2313 - Manual (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 LOW DATA
XA1
XA0
BS
XTAL1
WR
RDY/BSY
RESET
OE
12V
DATA HIGH
DATA
XA1
XA0
BS
XTAL1
WR
RDY/BSY
RESET +12V
OE