256K (32K x 8-Bit) OTP EPROM
F
IGURE
2. P
AGE
P
ROGRAMMING
F
LOWCHART
START
27C256T
SET PAGE PROG. MODE
V
PP
=12.5+0.3V, V
CC
=6.0+ 0.25V
Address=0
A
n=0
n+1
Latch
NO
Address+1
Address
Address+1
Address
SET PAGE PROG./
VERIFY MODE
V
PP
=12.5+0.3V,
V
CC
=6.0+0.25V
n=25
YES
n
Latch
Memory
Program t
PW
=0.2ms+5%
Address+1
Address
VERIFY
NOGO
B
Latch
B
GO
Program t
OPW
=0.2ms
Address+1
Address
NO
Latch
Last
Address?
YES
A
SET PAGE MODE
V
CC
=5.0+0.25V, V
PP
=V
CC
READ
All Address
GO
END
NOGO
FAIL
06.24.03 REV 4
All data sheets are subject to change without notice
8
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