JS28F256P30T85 datasheet(73/102 Pages) INTEL

73 / 102 page

1-Gbit P30 Family

Datasheet

Intel StrataFlash® Embedded Memory (P30)

April 2005

Order Number: 306666, Revision: 001

13.3.1

Reading the Protection Registers

The Protection Registers can be read from any address. To read the Protection Register, first issue

the Read Device Identifier command at any address to place the device in the Read Device

Identifier state (see Section 9.2, “Device Commands” on page 50). Next, perform a read operation

using the address offset corresponding to the register to be read. Table 29, “Device Identifier

Information” on page 77 shows the address offsets of the Protection Registers and Lock Registers.

13.3.2

Programming the Protection Registers

To program any of the Protection Registers, first issue the Program Protection Register command

at the parameter’s base address plus the offset to the desired Protection Register (see Section 9.2,

“Device Commands” on page 50). Next, write the desired Protection Register data to the same

Protection Register address (see Figure 33, “Protection Register Map” on page 73).

Figure 33.

Protection Register Map

0x89

Lock Register 1

15 14 13 12 11 10 9

0x102

0x109

0x8A

0x91

128-bit Protection Register 16

(User-Programmable)

128-bit Protection Register 1

(User-Programmable)

0x88

0x85

64-bit Segment

(User-Programmable)

0x84

0x81

0x80

Lock Register 0

64-bit Segment

(Factory-Programmed)

15 14 13 12 11 10 9

128-Bit Protection Register 0

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