27C256T
256K (32K x 8-Bit) OTP EPROM
FIGURE 2. PAGE PROGRAMMING FLOWCHART
START
SET PAGE PROG. MODE
V
PP=12.5+0.3V, VCC=6.0+ 0.25V
Address=0
n=0
A
n+1
n
Latch
NO
SET PAGE PROG./
VERIFY MODE
VPP=12.5+0.3V,
VCC=6.0+0.25V
YES
Address+1
Address
Address+1
Address
n=25
Latch
Program tPW=0.2ms+5%
Address+1
Address
NOGO
VERIFY
Latch
B
B
GO
Program tOPW=0.2ms
Address+1
Address
Last
Address?
NO
Latch
YES
SET PAGE MODE
VCC=5.0+0.25V, VPP=VCC
A
READ
NOGO
All Address
GO
END
FAIL
06.24.03 REV 4
All data sheets are subject to change without notice
8
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All rights reserved.