66
AT90S2313
0839G–08/01
Figure 50. Programming the Flash
Figure 51. Programming the Flash (Continued)
Reading the Flash The algorithm for reading the Flash memory is as follows (refer to “Programming the
Flash” for details on command and address loading):
1. A: Load Command “0000 0010”.
2. B: Load Address High Byte ($00 - $03).
3. C: Load Address Low Byte ($00 - $FF).
4. Set OE
to “0”, and BS to “0”. The Flash word low byte can now be read at DATA.
5. Set BS to “1”. The Flash word high byte can now be read from DATA.
6. Set OE
to “1”.
$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
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