Rainbow Electronics W27E020 - Manual (Page 8)

Preliminary W27E020
- 8 -
TIMING WAVEFORMS
AC Read Waveform
CE
Outputs
T
High Z
High Z
Valid Output
CE
T OE
T ACC
T OH
T DF
Address Address Valid
V IL
V IH
V IH
V IL
V IH
V IL
OE
Erase Waveform
Address
Read
SID
Device
Read
SID
A9 = 12.0V
Others = V IL
A0 = V
IL
Data
Chip Erase
A9 = 14.0V
Erase Verify
Address
Stable
T AS
DA 01 Data All One
14.0V
5.0V
A0=VIH
5V
Read Verify
Blank Check
Manufacturer
Address
Stable
Address
Stable Others=V IL
Others = V IL
T AS T AS T AHC
T DS T DH
T VPS
T DFP
D OUT D OUT D OUT
T AH
T ACC
V IH
V IL
V PP
CE
OE
PGM
T CE
T OE T OE
T OES
T OEV T PWE
T CES
T OE
V IH
V IL
V IH
V IL