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18.1.3 Programming algorithm of built-in PROM
Set Vcc = 6 V, V
PP
After applying a programming pulse of 0.2 ms, check whether data can be read or not.
If the data cannot be read, apply a programming pulse of 0.2 ms again.
Repeat the procedure, which consists of applying a programming pulse of 0.2 ms and read check, until
the data can be read. Additionally, record the number of applied pulses ( χ) before the data has been
read.
Apply χ pulse (0.2
When this procedure (
the last address is reached.
After programming to the last address, read data when Vcc = V
Figure 18.1.2 shows the programming algorithm flowchart.
= 12.5 V, and address to 14000
χ ms) (described in
to
) is completed, increment the address and repeat the above procedure until
7751 Group User's Manual
.
16
) as additional programming pulses.
PP
PROM VERSION
18.1 EPROM mode
= 5 V (or Vcc = V
PP
= 5.5 V).
18–7
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