Figure 7
AC Waveforms for Read Operations
Addresses
CE
OE
WE
Outputs
tRC
Addresses Stable
tACC
tDF
tOE
tCE
High Z
tOH
Output Valid
High Z
Figure 8
Write/Erase/Program
Operation, WE Controlled
Addresses
CE
OE
WE
Data
5555H
tWC
PA
tAS
tAH
tGHWL
tWP
tCE
tDS
tWPH
AOH
tDH
PD
Data Polling
PA
tWHWH1
D7 DOUT
5.0V
Notes:
1. PA is the address of the memory location to be programmed.
2. PD is the data to be programmed at byte address.
3. D7 is the 0utput of the complement of the data written to the deviced.
4. Dout is the output of the data written to the device.
5. Figure indicates last two bus cycles of four bus cycle sequence.
tRC
tDF
tOE
tOH
tCE
Aeroflex Circuit Technology
13
SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700