W27E520 Datasheet, PDF (9/16 Pages) Winbond – 64K X 8 ELECTRICALLY ERASABLE EPROM

W27E520
Timing Waveforms, continued
Erase Waveform 1
V IH
A[15:8]
V IL
V _IH
AD[7:0] _{V IL}
13.0V
OE/Vpp
V _IH
V IL
ALE
V _IH
V IL
Read
Company
SID
Read
Device
SID
VDD = 5.0V
A9 = 12.0V
Others = VIL or VIH
A8 = VIL A8 = VIH
Chip Erase
VDD = 6.5V
A9 = 13.0V
Others = VILor VIH
A8, A11 = VIL
A10 = VIH
Erase (Verify)
VDD = 6.5V
Address Valid
DA
1F
TPRT
Add
T_VR
DOUT
TEOE
TOES
TOEH
TEPW
Erase Waveform 2
V IH
A[15:8]
V IL
OE/Vpp ^{V IH}
V IL
V IH
V IL
V IH
AD[7:0] _{V IL}
Read
Company
SID
Read
Device
SID
VDD =5.0V
A9=12.0
V
Others=VIL or VIH
A8=VIL
A8=V IH
Chip Erase
Command 1
Command 2
VDD =6.5V
VDD =6.5V
TAS
A[15:8] = 55
A[15:8] = 2A
TRPT
TVS
TPRT
TOES
TOEH
TOES
DA
TALE
TLAS
TLAH
TEPW1
TDS
TDH
1F
55
AA
AA
TEPW2
10
Erase Verify
VDD =6.5V
Address Valid
TEOE
Add
DOUT
Note: First command Address = 5555(hex) with Data = AA(hex)
Second command Address = 2AAA(hex) with Data = 10(hex)
-9-
Publication Release Date: September 2000
Revision A2