M29W800T datasheet(7/33 Pages) STMICROELECTRONICS

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Address Range (x8)

Address Range (x16)

A18

A17

A16

A15

A14

A13

A12

00000h-03FFFh

00000h-01FFFh

04000h-05FFFh

02000h-02FFFh

06000h-07FFFh

03000h-03FFFh

08000h-0FFFFh

04000h-07FFFh

10000h-1FFFFh

08000h-0FFFFh

20000h-2FFFFh

10000h-17FFFh

30000h-3FFFFh

18000h-1FFFFh

40000h-4FFFFh

20000h-27FFFh

50000h-5FFFFh

28000h-2FFFFh

60000h-6FFFFh

30000h-37FFFh

70000h-7FFFFh

38000h-3FFFFh

80000h-8FFFFh

40000h-47FFFh

90000h-9FFFFh

48000h-4FFFFh

A0000h-AFFFFh

50000h-57FFFh

B0000h-BFFFFh

58000h-5FFFFh

C0000h-CFFFFh

60000h-67FFFh

D0000h-DFFFFh

68000h-6FFFFh

E0000h-EFFFFh

70000h-77FFFh

F0000h-FfFFFh

78000h-7FFFFh

Table 3B. M29W800B Block Address Table

Instructions

Seven instructions are defined to perform Read

Array, Auto Select (to read the ElectronicSignature

or Block Protection Status), Program, Block Erase,

Chip Erase, Erase Suspend and Erase Resume.

The internal P/E.C. automatically handles all tim-

ing and verification of the Program and Erase

operations. The Status Register Data Polling, Tog-

gle, Error bits and the RB output may be read at

any time, during programming or erase, to monitor

the progress of the operation.

Instructions are composed of up to six cycles. The

first two cycles input a Coded sequence to the

Command Interfacewhich is common to all instruc-

tions (see Table 8).

The third cycle inputs the instruction set-up com-

mand. Subsequent cycles output the addressed

data, Electronic Signature or Block Protection

Status for Read operations. In order to give addi-

tional data protection, the instructions for Program

and Block or Chip Erase require further command

inputs. For a Program instruction, the fourth com-

mand cycle inputs the address and data to be

programmed. For an Erase instruction (Block or

Chip), the fourth and fifth cycles input a further

Coded sequence before the Erase confirm com-

mand on the sixthcycle. Erasure of a memory block

may be suspended, in order to read data from

another block or to program data in another block,

and then resumed.

When power is first applied or if VCC falls below

VLKO, the command interface is reset to Read

Array.

7/33

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