LC86E5420

No.6805-4/21

(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 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 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.

(4) How to eliminate

The programming data can be erased by using the EPROM eraser.

(5) Shielding

The UVEPROM (ultraviolet erasable and programmable ROM) is in it. Put the seal on the window in use.

Data security

Data security

Not data security

Not data security

W86EP5420D

W86EP5420Q