HN58C1001P-15 HITACHI [Hitachi Semiconductor], HN58C1001P-15 Datasheet - Page 18

• Manufacturer Part Number: HN58C1001P-15
• Description: 1M EEPROM (128-kword x 8-bit) Ready/Busy and RES function
• Manufacturer: HITACHI [Hitachi Semiconductor]

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.
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.
The software data protection is not enabled at the shipment.
Note: There are some differences between Hitachi’s and other company’s for enable/disable sequence of
18
software data protection. If there are any questions , please contact with Hitachi sales offices.
AAAA or 2AAA
Write address
Address
5555
5555
AAAA or 2AAA
AAAA or 2AAA
Address
5555
5555
5555
5555
Write data }
Data
AA
A0
55
Normal data input
Data
AA
AA
55
80
55
20