28C64A_04 Datasheet, PDF (5/10 Pages) Microchip Technology – 64K (8K x 8) CMOS EEPROM

28C64A
FIGURE 1-3: DATA POLLING WAVEFORMS
VIH
Address
VIL
VIH
CE
VIL
VIH
WE
VIL
Address Valid
t WPL
t WPH
VIH
OE
VIL
VIH
Data
VIL
t DV
Data In
Valid
t WC
FIGURE 1-4: CHIP CLEAR WAVEFORMS
VIH
CE
VIL
t ACC
t CE
Last Written
Address Valid
t OE
I/O7 Out
True Data Out
VH
OE
VIH
VIH
WE
VIL
tS
tH
tW
tW = 10ms
tS = tH = 1µs
VH = 12.0V ±0.5V
TABLE 1-5: SUPPLEMENTARY CONTROL
Mode
CE
OE
WE
A9
VCC
Chip Clear
VIL
VIH
VIL
X
VCC
Extra Row Read
VIL
VIL
VIH
A9 = VH
VCC
Extra Row Write
*
VIH
*
A9 = VH
VCC
Note: VH = 12.0V±0.5V.
*Pulsed per programming waveforms.
I/OI
Data Out
Data In
 2004 Microchip Technology Inc.
DS11109K-page 5