23C256 Ver la hoja de datos (PDF) - NEC => Renesas Technology
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23C256 Datasheet PDF : 32 Pages
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µPD23C256112A
Sequential Read
In read modes (1), (2), and (3), when a command (00H, 01H, 50H) is input and an address specified, if it is in the
block that includes the address that was specified first, the address is automatically incremented and the read
operation is continuously performed until the last address in the same block, by inputting the /RE clock. At this time, a
Busy period (tR) occurs after the last address is accessed in a page.
Command
input Address
00H input
01H
50H
Page M
data output
Page M+1
data output
R, /B
tR
Busy
tR
Busy
tR
Busy
Note
Command
Output of in last page
in block
input
00H
Address
input
01H
50H
Data output
tR
tCRY Note
tR
Busy
Busy
Busy
In same block
(Maximum of 32 pages)
Note To perform read again after reading the 527th byte of data of the last page of block, stop the read operation once,
and then restart the read operation by inputting again the read command and an address.
Relationship Between Command and Start Address (SA) during Sequential Read
(A)
(B)
(C)
(A)
(B)
(C)
(A)
(B)
(C)
0
256
512 527 0
256
512 527 0
256
512 527
SA
SA
SA
1 block
= 32 pages
Sequential read mode (1)
(When "00H" command is input)
Sequential read mode (2)
(When "01H" command is input)
Sequential read mode (3)Note
(When "50H" command is input)
Note When the "50H" command is set, only the (C) area (redundancy data part) is continuously read.
• When the “00H” command is set, the start address (SA) is set to area (A).
• When the “01H” command is set, the start address (SA) is set to area (B).
• When the “50H” command is set, the start address (SA) is set to area (C).
Data Sheet M15902EJ2V0DS
17
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