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TH58NS100DC 데이터시트(HTML) 25 Page - Toshiba Semiconductor

부품명 TH58NS100DC
상세내용  TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS 1 - GBIT (128M X 8 BITS) CMOS NAND E2PROM ( 128M BYTE SmartMediaTM )
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제조사  TOSHIBA [Toshiba Semiconductor]
홈페이지  http://www.semicon.toshiba.co.jp/eng
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TH58NS100DC 데이터시트(HTML) 25 Page - Toshiba Semiconductor

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TH58NS100DC
2001-03-21
25/43
Status Read
The device has two Status Read commands. One is Status Read (1) command “70H” and the other is Status
Read (2) command “71H”.
The device automatically implements the execution and verification of the Program and Erase operations.
The Status Read function is used to monitor the Ready/Busy status of the device, determine the result
(pass/fail) of a Program or Erase operation, and determine whether the device is in Protect mode. The device
status is output via the I/O port on the RE clock after a Status Read command “70H” or “71H” input.
The resulting information of Status Read (1) command “70H” is outlined in Table 5 below and the resulting
information of Status Read (2) command “71H” is outlined in the explanation for Multi Block Program and
Multi Block Erase toward the end of this document.
Table 5. Status output table for Status Read (1) command “70H”
STATUS
OUTPUT
I/O1
Pass/Fail
Pass: 0
Fail: 1
I/O2
Not Used
0
I/O3
Not Used
0
I/O4
Not Used
0
I/O5
Not Used
0
I/O6
Not Used
0
I/O7
Ready/Busy
Ready: 1
Busy: 0
I/O8
Write Protect
Protect: 0
Not Protected: 1
The Pass/Fail status on I/O1 is only
valid when the device is in the Ready
state.
An application example with multiple devices is shown in Figure 6.
System Design Note: If the
BY
/
RY
pin signals from multiple devices are wired together as shown in the
diagram, the Status Read function can be used to determine the status of each individual device.
Device
1
CLE
1
CE
Device
2
2
CE
Device
3
3
CE
Device
N
N
CE
Device
N
+ 1
1
N
CE
+
ALE
WE
RE
I/O1
to I/O8
BY
/
RY
WE
RE
Status on Device 1
70H
1
CE
ALE
I/O
70H
Status on Device N
BY
/
RY
CLE
N
CE
Figure 6. Status Read timing application example
Busy


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