AM29F002BB-70EE データシートの表示（PDF） - Advanced Micro Devices

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AM29F002BB-70EE

2 Megabit (256 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory

Advanced Micro Devices 

Sector

SA0

SA1

SA2

SA3

SA4

SA5

SA6

Table 3. Am29F002B/Am29F002NB Bottom Boot Block Sector Address Table

A17

A16

A15

A14

A13

0

0

0

0

X

0

0

0

1

0

0

0

0

1

1

0

0

1

X

X

0

1

X

X

X

1

0

X

X

X

1

1

X

X

X

Sector Size

(Kbytes)

16

8

8

32

64

64

64

Address Range

(in hexadecimal)

00000h–03FFFh

04000h–05FFFh

06000h–07FFFh

08000h–0FFFFh

10000h–1FFFFh

20000h–2FFFFh

30000h–3FFFFh

Autoselect Mode

The autoselect mode provides manufacturer and

device identification, and sector protection verification,

through identifier codes output on DQ7–DQ0. This

mode is primarily intended for programming equipment

to automatically match a device to be programmed with

its corresponding programming algorithm. However,

the autoselect codes can also be accessed in-system

through the command register.

When using programming equipment, the autoselect

mode requires VID on address pin A9. Address pins A6,

A1, and A0 must be as shown in Autoselect Codes

(High Voltage Method) table. In addition, when veri-

fying sector protection, the sector address must appear

on the appropriate highest order address bits. Refer to

the corresponding Sector Address Tables. The

Command Definitions table shows the remaining

address bits that are don’t care. When all necessary

bits have been set as required, the programming

equipment may then read the corresponding identifier

code on DQ7–DQ0.

To access the autoselect codes in-system, the host

system can issue the autoselect command via the

command register, as shown in the Command Defini-

tions table. This method does not require VID. See

“Command Definitions” for details on using the autose-

lect mode.

Table 4. Am29F002B/Am29F002NB Autoselect Codes (High Voltage Method)

Description

Manufacturer ID: AMD

Device ID:

Am29F002B/Am29F002NB

(Top Boot Block)

Device ID:

Am29F002B/Am29F002NB

(Bottom Boot Block)

Sector Protection Verification

A17 A12

A8

A5

to to

to

to

CE# OE# WE# A13 A10 A9 A7 A6 A2 A1 A0

L

L

H

X

X VID X

L

X

L

L

L

L

H

X

X VID X

L

X

L

H

L

L

H

DQ7

to

DQ0

01h

B0h

L

L

H

X

X VID X

L

X

L

H

34h

L

L

H

01h

(protected)

L

L

H SA X VID X

L

X

H

L

00h

(unprotected)

L = Logic Low = VIL, H = Logic High = VIH, SA = Sector Address, X = Don’t care.

Sector Protection/Unprotection

The hardware sector protection feature disables both

program and erase operations in any sector. The hard-

ware sector unprotection feature re-enables both

program and erase operations in previously protected

sectors.

10

Am29F002B/Am29F002NB

November 28, 2000

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