TC58DVMXXX 데이터 시트보기 (PDF) - Toshiba

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TC58DVMXXX

128-MBIT (16M u8 BITS/8M x 16BITS) CMOS NAND E²PROM

Toshiba 

TC58DVM72A1FT00/ TC58DVM72F1FT00

TC58DAM72A1FT00/ TC58DAM72F1FT00

Status Read

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 70H command input. The resulting information is outlined in Table 5.

Table 5. Status output table

STATUS

OUTPUT

I/O1

I/O2

I/O3

I/O4

I/O5

I/O6

I/O7

I/O8

I/O9 to I/O16

Pass/Fail

Not Used

Not Used

Not Used

Not Used

Not Used

Ready/Busy

Write Protect

Not Used

Pass: 0

0

0

0

0

0

Ready: 1

Protect: 0

0

Fail: 1

The Pass/Fail status on I/O1 is only

valid when the device is in the Ready

state.

Busy: 0

Not Protected: 1

An application example with multiple devices is shown in Figure 6.

CE1

CE2

CE3

CLE

ALE

WE

RE

I/O1

~I/O8

RY/BY

Device

1

Device

2

Device

3

CEN

Device

N

CEN  1

Device

N 1

RY/BY

Busy

CLE

ALE

WE

CE1

CEN

RE

I/O

70H

70H

Status on

Device 1

Status on

Device N

Figure 6. Status Read timing application example

System Design Note: If the RY/BY 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.

2003-01-24 21/34

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