AM29LV081B-90EEB 데이터 시트보기 (PDF) - Advanced Micro Devices

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AM29LV081B-90EEB

8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory

Advanced Micro Devices 

Table 2. Am29LV081B Sector Address Table

A19 A18 A17 A16 A15 A14 A13

Sector Size

SA0

0

0

0

0

X

X

X

64 Kbytes

SA1

0

0

0

1

X

X

X

64 Kbytes

SA2

0

0

1

0

X

X

X

64 Kbytes

SA3

0

0

1

1

X

X

X

64 Kbytes

SA4

0

1

0

0

X

X

X

64 Kbytes

SA5

0

1

0

1

X

X

X

64 Kbytes

SA6

0

1

1

0

X

X

X

64 Kbytes

SA7

0

1

1

1

X

X

X

64 Kbytes

SA8

1

0

0

0

X

X

X

64 Kbytes

SA9

1

0

0

1

X

X

X

64 Kbytes

SA10

1

0

1

0

X

X

X

64 Kbytes

SA11

1

0

1

1

X

X

X

64 Kbytes

SA12

1

1

0

0

X

X

X

64 Kbytes

SA13

1

1

0

1

X

X

X

64 Kbytes

SA14

1

1

1

0

X

X

X

64 Kbytes

SA15

1

1

1

1

X

X

X

64 Kbytes

Address Range

00000h-0FFFFh

10000h-1FFFFh

20000h-2FFFFh

30000h-3FFFFh

40000h-4FFFFh

50000h-5FFFFh

60000h-6FFFFh

70000h-7FFFFh

80000h-8FFFFh

90000h-9FFFFh

A0000h-AFFFFh

B0000h-BFFFFh

C0000h-CFFFFh

D0000h-DFFFFh

E0000h-EFFFFh

F0000h-FFFFFh

Autoselect Mode

The autoselect mode provides manufacturer and de-

vice 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 (11.5 V to 12.5 V) on address pin A9.

Address pins A6, A1, and A0 must be as shown in Table

3. In addition, when verifying sector protection, the sec-

tor address must appear on the appropriate highest

order address bits (see Table 2). Table 3 shows the re-

maining address bits that are don’t care. When all nec-

essary 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 Table 4. This method

does not require VID. See “Command Definitions” for

details on using the autoselect mode.

Table 3. Am29LV081B Autoselect Codes (High Voltage Method)

Description

A19 A12

A8

A5

to to

to

to

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

DQ7

to

DQ0

Manufacturer ID: AMD

Device ID: Am29LV081B

Sector Protection Verification

L

L

H

X X VID X

L

X

L

L

01h

L

L

H

X

X VID X

L

X

L

H

38h

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.

Am29LV081B

9

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