23C256 데이터 시트보기 (PDF) - NEC => Renesas Technology
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23C256 Datasheet PDF : 32 Pages
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µPD23C256112A
Memory Area
0
•
0
1
2
1 Block •
= 32 Pages •
•
30
31
•
•
•
•
•
•
•
•
•
65,533
65,534
65,535
1 Page = 528 Bytes
•
•
255 256 •
•
•
(A)
(B)
512 Bytes
(Main memory)
511 • 527
(C)
2,048 Blocks
= 65,536 Pages
16 Bytes
(Redundancy)
• The start address (SA) during read operation is specified divided into three areas using three types of read
commands.
In read mode (1), start address (SA) is set in area (A).
In read mode (2), start address (SA) is set in area (B).
In read mode (3), start address (SA) is set in area (C).
One page consists of a total of 528 bytes broken down into 512 bytes (main memory) and 16 bytes (redundancy).
One block consists of 32 pages.
Caution The data of area (C) is redundancy. Redundancy is not programmable parts and is fixed to all FFH.
6
Data Sheet M15902EJ2V0DS
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