HN58C1001 Просмотр технического описания (PDF) - Renesas Electronics
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HN58C1001 Datasheet PDF : 24 Pages
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HN58C1001 Series
3. Software data protection
To prevent unintentional programming, this device has the software data protection (SDP) mode. The
SDP is enabled by inputting the following 3 bytes code and write data. SDP is not enabled if only the 3
bytes code is input. To program data in the SDP enable mode, 3 bytes code must be input before write
data.
Address
Data
5555
AA
↓
↓
AAAA or 2AAA 55
↓
↓
5555
A0
↓
↓
Write address Write data } Normal data input
The SDP mode is disabled by inputting the following 6 bytes code. Note that, if data is input in the SDP
disable cycle, data can note be written.
Address
5555
↓
AAAA or 2AAA
↓
5555
↓
5555
↓
AAAA or 2AAA
↓
5555
Data
AA
↓
55
↓
80
↓
AA
↓
55
↓
20
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
sequence of software data protection. If there are any questions , please contact with Renesas
Technology’s sales offices.
Rev.8.00, Nov. 27.2003, page 19 of 21
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