AM29F080B datasheet(12/39 Pages) AMD

12 / 39 page

Am29F080B

21503G5 November 1, 2006

D A TA SH EE T

Table 1.

Am29F080B Sector Address Table

Note: All sectors are 64 Kbytes in size.

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 2.

Am29F080B Autoselect Codes (High Voltage Method)

Legend: L = Logic Low = VIL, H = Logic High = VIH, SGA = Sector Group Address, X = Don’t care.

Note:The system may also autoselect information in-system via the command register. See Table 4.

Sector

A19

A18

A17

A16

Address Range

SA0

000000h–00FFFFh

SA1

010000h–01FFFFh

SA2

020000h–02FFFFh

SA3

030000h–03FFFFh

SA4

040000h–04FFFFh

SA5

050000h–05FFFFh

SA6

060000h–06FFFFh

SA7

070000h–07FFFFh

SA8

080000h–08FFFFh

SA9

090000h–09FFFFh

SA10

0A0000h–0AFFFFh

SA11

0B0000h–0BFFFFh

SA12

0C0000h–0CFFFFh

SA13

0D0000h–0DFFFFh

SA14

0E0000h–0EFFFFh

SA15

0F0000h–0FFFFFh

Description

CE#

OE#

WE#

A19

A12

A11

A10

DQ7

DQ0

Manufacturer ID: AMD

VID

01h

Device ID: Am29F080B

VID

XLX

D5h

Sector Group

Protection Verification

SGA

VID

XLX

01h (protected)

00h

(unprotected)

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