STATUS READ

The NM29N16SR automatically implements the execution and verification of the program and erase operations The status

read function is used to monitor the ReadyBusy status of the device determines the passfail result of a program or erase

operation and determines if the device is in a suspend or protect mode The device status is output through the IO port using

the RE clock after a ‘‘70H’’ command input The resulting information is outlined in Table V

TABLE V Status Output Table

Status

Output

IO 1

PassFail

Pass ‘‘0’’

Fail ‘‘1’’

The PassFail status in IO 1 is only valid

mode

status while in the Busy state at Read

The device will always indicate a Pass

when the device is in the Ready state

IO 2

Not Used

‘‘0’’

IO 3

Not Used

‘‘0’’

IO 4

Not Used

‘‘0’’

IO 5

Not Used

‘‘0’’

IO 6

Suspend

Suspended ‘‘1’’

Not suspended ‘‘0’’

IO 7

ReadyBusy

Ready ‘‘1’’

Busy ‘‘0’’

IO 8

Write Protect

Protect ‘‘0’’

Not Protect ‘‘l’’

Application example with multiple devices is shown in

Figure 5 below

TLD11915 – 33

FIGURE 5 Status Read Timing Application Example

Note

If the RB pin signals of multiple devices are common-wired as shown in the diagram the status Read function can be used to determine the status of each

individually selected device

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