edi88257c White Electronic Designs Corporation, edi88257c Datasheet - Page 4

• Manufacturer Part Number: edi88257c
• Description: 256kx8 Monolithic Sram
• Manufacturer: White Electronic Designs Corporation

White Electronic Designs Corp. reserves the right to change products or specifi cations without notice.
September 1999
Rev. 2
ADDRESS
DATA I/O
White Electronic Designs
READ CYCLE 1 (W# HIGH; G#, E# LOW)
t
ADDRESS 1
AVQV
t
AVAV
DATA OUT
ADDRESS
DATA IN
FIGURE 2 – TIMING WAVEFORM - READ CYCLE
FIGURE 3 – WRITE CYCLE - W# CONTROLLED
FIGURE 4 – WRITE CYCLE - E# CONTROLLED
DATA 1
DATA OUT
W#
ADDRESS
E#
t
DATA IN
ADDRESS 2
AVQX
W#
E#
t
AVEL
t
DATA 2
WRITE CYCLE 2, E# CONTROLLED
AVWL
WRITE CYCLE 1, W# CONTROLLED
t
AVEH
t
AVWH
t
HIGH Z
4
WLQZ
t
t
t
ELEH
WLEH
t
AVAV
ELWH
t
DATA OUT
AVAV
ADDRESS
t
WLWH
t
DVEH
G#
E#
DATA VALID
White Electronic Designs Corporation • [phone] •www.whiteedc.com
t
DVWH
HIGH Z
DATA VALID
t
WHQX
t
t
t
t
WHDX
EHDX
WHAX
EHAX
t
ELQX
READ CYCLE 2 (W# HIGH)
t
GLQX
t
t
t
ELQV
GLQV
AVQV
t
AVAV
EDI88257C
t
t
GHQZ
EHQZ