Aeroflex Circuit Technology

SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700

13

AC Waveforms for Read Operations

Figure 7

Output Valid

High Z

High Z

Outputs

OE

WE

CE

Addresses

Addresses Stable

WE

OE

CE

Data

Addresses

5.0V

5555H

PA

Data Polling

PA

D7

PD

AOH

Write/Erase/Program

Figure 8

Operation, WE Controlled

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.