HN58C256AP85E Renesas Electronics America, HN58C256AP85E Datasheet - Page 20
![IC, EEPROM, 256KBIT, 1MHZ, DIP-28](/photos/19/5/190505/4467765_sml.jpg)
HN58C256AP85E
Manufacturer Part Number
HN58C256AP85E
Description
IC, EEPROM, 256KBIT, 1MHZ, DIP-28
Manufacturer
Renesas Electronics America
Datasheet
1.HN58C256AP85E.pdf
(26 pages)
Specifications of HN58C256AP85E
Memory Size
256Kbit
Memory Configuration
32K X 8
Ic Interface Type
Parallel
Access Time
85ns
Supply Voltage Range
4.5V To 5.5V
Memory Case Style
DIP
No. Of Pins
28
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
HN58C256A Series, HN58C257A Series
3. Software data protection
Note: There are some differences between Renesas Technology’s and other company’s for enable/disable
Rev.6.00, Oct. 26.2006, page 20 of 24
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 not 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
2AAA
5555
5555
↓
↓
↓
Address
2AAA
2AAA
5555
5555
5555
5555
↓
↓
↓
↓
↓
Write data }
Data
AA
A0
55
↓
↓
↓
Normal data input
Data
AA
AA
55
80
55
20
↓
↓
↓
↓
↓