AM29F016B-150SC View Datasheet(PDF) - Advanced Micro Devices

Part Name

Description

Manufacturer

AM29F016B-150SC

16 Megabit (2 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory

Advanced Micro Devices 

PRELIMINARY

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

Autoselect Codes (High Voltage Method) table. In addi-

tion, when verifying sector protection, the sector ad-

dress must appear on the appropriate highest order

address bits. Refer to the corresponding Sector Ad-

dress 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 program-

ming 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 3. Am29F016B Autoselect Codes (High Voltage Method)

Description

Manufacturer ID:

AMD

Device ID:

Am29F016B

Sector Group

Protection

Verification

CE# OE# WE# A20-A18 A17-A10 A9 A8-A7 A6 A5-A2 A1 A0

L LH

X

X

VID

X

VIL

X

VIL VIL

L LH

X

X

VID

X

VIL

X

VIL VIH

Sector

L L H Group

X

VID

X

VIL

X

VIH VIL

Address

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

DQ7-DQ0

01h

ADh

01h (protected)

00h (unprotected)

Sector Group Protection/Unprotection

The hardware sector group protection feature dis-

ables both program and erase operations in any sec-

tor group. Each sector group consists of four adjacent

sectors. Table 4 shows how the sectors are grouped,

and the address range that each sector group con-

tains. The hardware sector group unprotection fea-

ture re-enables both program and erase operations in

previously protected sector groups.

Sector group protection/unprotection must be imple-

mented using programming equipment. The procedure

requires a high voltage (VID) on address pin A9 and the

control pins. Details on this method are provided in a

supplement, publication number 19613. Contact an

AMD representative to obtain a copy of the appropriate

document.

The device is shipped with all sector groups unpro-

tected. AMD offers the option of programming and pro-

tecting sector groups at its factory prior to shipping the

device through AMD’s ExpressFlash™ Service. Con-

tact an AMD representative for details.

It is possible to determine whether a sector group is

protected or unprotected. See “Autoselect Mode” for

details.

Table 4. Sector Group Addresses

Sector

Group

A20

A19

A18

Sectors

SGA0

0

0

0

SA0–SA3

SGA1

0

0

1

SA4–SA7

SGA2

0

1

0

SA8–SA11

SGA3

0

1

1

SA12–SA15

SGA4

1

0

0

SA16–SA19

SGA5

1

0

1

SA20–SA23

SGA6

1

1

0

SA24–SA27

SGA7

1

1

1

SA28–SA31

Temporary Sector Group Unprotect

This feature allows temporary unprotection of previ-

ously protected sector groups to change data in-sys-

tem. The Sector Group Unprotect mode is activated

by setting the RESET# pin to VID. During this mode,

formerly protected sector groups can be programmed

or erased by selecting the sector group addresses.

Once VID is removed from the RESET# pin, all the

previously protected sector groups are

protected again. Figure 1 shows the algorithm, and

the Temporary Sector Group Unprotect diagram (Fig-

ure 16) shows the timing waveforms, for this feature.

Am29F016B

11

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