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BUS OPERATION--1
Legend:
L=Logic LOW=VIL, H=Logic High=VIH, VID=12.0 0.5V, VHH=11.5 -12.5V, X=Don't Care,
AIN=Address IN, DIN=Data IN,DOUT=Data OUT
Notes:
1. When the WP/ACC pin is at VHH, the device enters the accelerated program mode. See
"Accelerated Program Operations" for more information.
2. The sector group protect and chip unprotect functions may also be implemented via
programming equipment. See the "Sector Group Protection and Chip Unprotection"
section.
3. If WP/ACC=VIL, the two outermost boot sectors remain protected. If WP/ACC=VIH, the
two outermost boot sector protection depends on whether they were last protected or
unprotected using the method described in "Sector/Sector Block Protection and
Unprotection". If WP/ACC=VHH, all sectors will be unprotected.
4. DIN or Dout as required by command sequence, data polling, or sector protection
algorithm.
5. Address are A20:A0 in word mode (BYTE=VIH), A20:A-1 in byte mode (BYTE=VIL).
CONFIDENTIAL – DO NOT COPY
Page 7-24
File No. SG-0212
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