LC86P5420

No.6730-4/22

W86EP5420D

W86EP5420Q

(3) How to use the data security function

"Data security" is the disabled function to read the data of the EPROM.

The following is the process in order to execute the data security.

1. Set 'ON' the jumper of attachment.

2. Program again. Then the EPROM programmer displays the error. The error means normally

activity of the data security. It is not a trouble of the EPROM programmer or the LSI.

Notes

• Data security is not executed when the data of all address have 'FFH' at the sequence 2 above.

• The programming by a sequential operation "BLANK=>PROGRAM=>VERIFY" cannot be executed

data security at the sequence 2 above.

• Set 'OFF' to the jumper after executing the data security.

Data security

Not data security

Data security

Not data security