hn58v66ati-10e Renesas Electronics Corporation., hn58v66ati-10e Datasheet - Page 23

• Manufacturer Part Number: hn58v66ati-10e
• Description: 64k Eeprom 8-kword X 8-bit Ready/busy Function, Res Function Hn58v66a Wide Temperature Range Version
• Manufacturer: Renesas Electronics Corporation.

HN58V65AI/HN58V66AI/HN58V65A-SR/HN58V66A-SR Series
3. Software data protection
Software data protection mode can be canceled 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 canceling
cycle, the data cannot be written.
The software data protection is not enabled at the shipment.
Note: There are some differences between Renesas Technology’s and other company’s for enable/disable
Rev.3.00, Feb.02.2004, 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 byte code is input.
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
↓
↓
↓
↓
↓