A29001 データシートの表示（PDF） - AMIC Technology

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A29001

128K X 8 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory

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and then read I/O3. If I/O3 is "1", the internally controlled

erase cycle has begun; all further commands (other than

Erase Suspend) are ignored until the erase operation is

complete. If I/O3 is "0", the device will accept additional

sector erase commands. To ensure the command has

been accepted, the system software should check the

status of I/O3 prior to and following each subsequent

sector erase command. If I/O3 is high on the second status

check, the last command might not have been accepted.

Table 6 shows the outputs for I/O3.

A29001/A290011 Series

START

Read I/O7-I/O0

Read I/O7-I/O0 (Note 1)

Toggle Bit

No

= Toggle ?

Yes

No

I/O5 = 1?

Yes

Read I/O7 - I/O0

Twice

(Notes 1,2)

Toggle Bit

No

= Toggle ?

Yes

Program/Erase

Operation Not

Commplete, Write

Reset Command

Program/Erase

Operation Complete

Notes :

1. Read toggle bit twice to determine whether or not it is

toggling. See text.

2. Recheck toggle bit because it may stop toggling as I/O5

changes to "1". See text.

Figure 5. Toggle Bit Algorithm

(December, 2004, Version 1.3)

14

AMIC Technology, Corp.

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