P R E L I M I N A R Y
FLASH AC CHARACTERISTICS
Erase Command Sequence (last two cycles)
Read Status Data
VA
tAS
tWC
VA
Addresses
CE#f
2AAh
SADD
555h for chip erase
tAH
tGHWL
tCH
OE#
tWP
WE#
tWPH
tWHWH2
tCS
tDS
tDH
In
Data
Complete
55h
30h
Progress
10 for Chip Erase
tBUSY
tRB
RY/BY#
tVCS
VCC
f
otes:
. SADD = sector address (for Sector Erase), VA = Valid Address for reading status data (see “Write Operation Status”.
.
These waveforms are for the word mode.
Figure 20. Chip/Sector Erase Operation Timings
July 19, 2002
Am49DL32xBG
47