Am29LV800B

11

P R E L I M I NARY

Table 3.

Am29LV800BB Bottom Boot Block Sector Address Table

Note for Tables 2 and 3: Address range is A18:A-1 in byte mode and A18:A0 in word mode. See “Word/Byte Configuration”

section for more information.

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

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

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

tor address must appear on the appropriate highest

order address bits (see Tables 2 and 3). Table 4 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 iden-

tifier 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 5. This method

details on using the autoselect mode.

Sector

A18

A17

A16

A15

A14

A13

A12

Sector Size

(Kbytes/

Kwords)

Address Range (in hexadecimal)

(x8)

Address Range

(x16)

Address Range

SA0

0000

00

X

16/8

00000h–03FFFh

00000h–01FFFh

SA1

0000

010

8/4

04000h–05FFFh

02000h–02FFFh

SA2

0000

011

8/4

06000h–07FFFh

03000h–03FFFh

SA3

0000

1

X

X

32/16

08000h–0FFFFh

04000h–07FFFh

SA4

0001

X

X

X

64/32

10000h–1FFFFh

08000h–0FFFFh

SA5

0010

X

X

X

64/32

20000h–2FFFFh

10000h–17FFFh

SA6

0011

X

X

X

64/32

30000h–3FFFFh

18000h–1FFFFh

SA7

0100

X

X

X

64/32

40000h–4FFFFh

20000h–27FFFh

SA8

0101

X

X

X

64/32

50000h–5FFFFh

28000h–2FFFFh

SA9

0110

X

X

X

64/32

60000h–6FFFFh

30000h–37FFFh

SA10

0111

X

X

X

64/32

70000h–7FFFFh

38000h–3FFFFh

SA11

1000

X

X

X

64/32

80000h–8FFFFh

40000h–47FFFh

SA12

1001

X

X

X

64/32

90000h–9FFFFh

48000h–4FFFFh

SA13

1010

X

X

X

64/32

A0000h–AFFFFh

50000h–57FFFh

SA14

1011

X

X

X

64/32

B0000h–BFFFFh

58000h–5FFFFh

SA15

1100

X

X

X

64/32

C0000h–CFFFFh

60000h–67FFFh

SA16

1101

X

X

X

64/32

D0000h–DFFFFh

68000h–6FFFFh

SA17

1110

X

X

X

64/32

E0000h–EFFFFh

70000h–77FFFh

SA18

1111

X

X

X

64/32

F0000h–FFFFFh

78000h–7FFFFh