A29DL323TV-90(2002) Ver la hoja de datos (PDF) - AMIC Technology

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A29DL323TV-90
(Rev.:2002)

32M-Bit CMOS Low Voltage Dual Operation Flash Memory 4M-Byte by 8-Bit (Byte Mode) / 2M-Word by 16-Bit (Word Mode)

AMIC Technology 

A29L323 Series

START

RESET=VID

Wait 4 us

Sector Group Protection

Address=Don't Care, Data=60H

Yes

All Sector Group Protected?

No

n=0

Verify Sector Group Protection

(A6, A1, A0)=(VIL, VIH, VIL)

A12 to A20=SGA, Data=40H

Read from Sector Group Address

(A6, A1, A0)=(VIL, VIH, VIL),

A12 to A20=SGA

Sector Group Protection No

Data=0H?

Yes

Last Sector Group (n=25)?

Yes

n=0, Pluse Count=1

No Next Sector Group Address

(n=n+1)

Sector Group Unprotect

(A6, A1, A0)=(VIH, VIH, VIL),

Data=60H

Timeout 15ms

Increment Pulse

No

Pulse Count=1000?

Yes

Remove VID from RESET,

Write Reset Command

Verify Sector Group Protection

(A6, A1, A0)=(VIH, VIH, VIL),

Address=SGA, Data=40H

Read from Sector Group Address

(A6, A1, A0)=(VIH, VIH, VIL),

A12 to A20=SGA

No

Data=00H?

Yes

Last Sector Group (n=25)?

Yes

Remove VID from RESET,

Write Reset Command

Yes Next Sector Group Address

(n=n+1)

Fail

Sector Group Protect Complete

Figure 2. Sector Group Unprotect Flow Chart

PRELIMINARY (May, 2002, Version 0.0)

18

AMIC Technology, Inc.

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