M28W640HCT datasheet(58/72 Pages) NUMONYX

58 / 72 page

Common Flash interface (CFI)

M28W640HCT, M28W640HCB

58/72

(P+F)h = 44h

0080h

Protection field 1: protection description

This field describes user-available one-time-programmable

(OTP) protection register bytes. Some are pre-programmed with

device unique serial numbers. Others are user programmable.

bits 0–15 point to the Protection Register Lock byte, the section’s

first byte.

The following bytes are factory pre-programmed and user-

programmable.

bit 0 to 7 Lock/bytes JEDEC-plane physical low address

bit 8 to 15Lock/bytes JEDEC-plane physical high address

bit 16 to 23 "n" such that 2n = factory pre-programmed bytes

bit 24 to 31 "n" such that 2n = user programmable bytes

80h

(P+10)h = 45h

0000h

00h

(P+11)h = 46h

0003h

8 byte

(P+12)h = 47h

0004h

16 byte

(P+13)h = 48h

Reserved

See Table 26, offset 15 for P pointer definition.

Table 30.

Security code area

Offset

Data

Description

80h

00XX

Protection Register Lock

81h

XXXX

64 bits: unique device number

82h

XXXX

83h

XXXX

84h

XXXX

85h

XXXX

128 bits: user programmable OTP

86h

XXXX

87h

XXXX

88h

XXXX

89h

XXXX

8Ah

XXXX

8Bh

XXXX

8Ch

XXXX

Table 29.

Primary algorithm-specific extended query table (continued)

Offset

P = 35h(1)

Data

Description

Value

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