AT29C432 Datasheet, PDF (10/11 Pages) ATMEL Corporation – 4 Megabit 5-volt Flash with 256K E2PROM Memory

AC Data Polling Characteristics ⁽¹⁾
Symbol
Parameter
Min
tWCE
Write Cycle Time, E²PROM
tWCF
Write cycle Time, Flash
tOEH
WE or CEE (CEF) Disable to OE Active
10
AC Data Polling Waveform
Max
Units
10
ms
10
ms
ns
Note: 1. The above timing diagram illustrates DATA Polling where Dn is equal to the state of I/07 for the last byte written and Dn
is its complement.
Software Product
Identification Entry ⁽¹⁾
Software Product
Identification Exit ⁽¹⁾
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA 90
TO
ADDRESS 5555
LOAD DATA AA
TO
ADDRESS 5555
LOAD DATA 55
TO
ADDRESS 2AAA
LOAD DATA F0
TO
ADDRESS 5555
PAUSE 10 mS
ENTER PRODUCT
IDENTIFICATION
MODE ^{(2, 3, 5)}
Notes for software product identification:
1. Data Format: I/O7 - I/O0 (Hex);
Address Format: A14 - A0 (Hex).
2. A1 - A18 = VIL. Manufacture Code is read for A0 = VIL;
Device Code is read for A0 = VIH. CEF = Low, CEE = High
3. The device does not remain in identification mode if powered down.
4. The device returns to standard operation mode.
5. Manufacturer Code: 1F
Device Code: B4
10
AT29C432
PAUSE 10 mS
EXIT PRODUCT
IDENTIFICATION
MODE ⁽⁴⁾