HN58V65AFP-10E RENESAS [Renesas Technology Corp], HN58V65AFP-10E Datasheet - Page 23

• Manufacturer Part Number: HN58V65AFP-10E
• Manufacturer: RENESAS [Renesas Technology Corp]

HN58V65A Series, HN58V66A Series
3. Software data protection
Note: There are some differences between Renesas Technology’s and other company’s for enable/disable
Rev.3.00, Dec. 04.2003, page 23 of 26
To prevent unintentional programming caused by noise generated by external circuits, this device has
the software data protection function. In software data protection mode, 3 bytes of data must be input
before write data as follows. And these bytes can switch the non-protection mode to the protection
mode. SDP is enabled if only the 3 bytes code is input.
Software data protection mode can be cancelled by inputting the following 6 bytes. After that, this
device turns to the non-protection mode and can write data normally. But when the data is input in the
cancelling cycle, the data cannot be written.
The software data protection is not enabled at the shipment.
sequence of software data protection. If there are any questions , please contact with Renesas
Technology’s sales offices.
Write address
Address
0AAA
1555
1555
Address
0AAA
0AAA
1555
1555
1555
1555
Write data }
Data
AA
A0
55
Normal data input
Data
AA
AA
55
80
55
20