TC581282A View Datasheet(PDF) - Toshiba
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TC581282A Datasheet PDF : 31 Pages
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TC581282AXB
Read Mode (3)
Read mode (3) has the same timing as Read modes (1) and (2) but is used to access information in the extra
16-byte redundancy area of the page. The start pointer is therefore set to a value between byte 512 and byte 527.
CLE
CE
WE
ALE
RE
RY/BY
I/O
Busy
50H
A0~A3
512
527
Figure 5. Read mode (3) operation
Addresses bits A0~A3 are used to set the start pointer for the
redundant memory cells, while A4~A7 are ignored.
Once a 50H command has been issued, the pointer moves to
the redundant cell locations and only those 16 cells can be
addressed, regardless of the value of the A4-to-A7 address. (An
00H command is necessary to move the pointer back to the
0-to-511 main memory cell location.)
2001-12-04 17/31
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