SST26VF016B-80ESLASHMF datasheet(81/84 Pages) MICROCHIP

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2014-2022 Microchip Technology Inc. and its subsidiaries

DS20005262G-page 81

SST26VF016B

11.1.2

NUMBER OF SECTORS

Number of Sectors represents the number of contigu-

ous sectors/blocks with similar size. A formula calcu-

lates the contiguous sectors/blocks with similar size.

Given the sector/block size, type and the number of

sectors, the address range of these sectors/blocks can

be determined along with specific Block Locking Reg-

ister bits that control the read/write protection of each

sector/block.

11.1.3

BLOCK PROTECTION REGISTER

BIT START LOCATION (BPSL)

Block Protection Register Bit Start Location (BPSL)

designates the start bit location in the Block Protection

tion begins. If the value of BPSL is 00H, this location is

the 0 bit location. If the value is other than 0, then this

value is a constant value adder (c) for a given formula,

(2m + 1) + (c) (see Section 11.1.5 “Memory Configu-

ration”).

From the initial location, there will be a bit location for

every increment by 1 until it reaches the Block Protec-

tion Register Bit End Location (BPEL). This number

range from BPSL to BPEL will correspond to and be

equal to the number of sectors/blocks on this Major

Section.

11.1.4

BLOCK PROTECTION REGISTER

BIT END LOCATION (BPEL)

Block Protection Register Bit End Location designates

the end bit location in the Block Protection Register bit

where the last sector/block of this Major Section ends.

The value in this field is a constant value adder (c) for

a given formula or equation,

(2m + 1) + (c) (see

Section 11.1.5 “Memory Configuration”).

11.1.5

MEMORY CONFIGURATION

For the SST26VF016B family, the memory configura-

tion is setup with different contiguous block sizes from

bottom to the top of the memory. For example, starting

from bottom of memory it has four 8-Kbyte blocks, one

32-Kbyte block, x number of 64-Kbyte blocks depend-

ing on memory size, then one 32-Kbyte block and four

8-Kbyte block on the top of memory (see Table 11-3).

TABLE 11-3: MEMORY BLOCK DIAGRAM REPRESENTATION

8-Kbyte Bottom Block

(from 000000H)

Section 1: Sector Type Number

Section 1: Number of Sectors

Section 1: Block Protection Register Bit Start Location

Section 1: Block Protection Register Bit End Location

32-Kbyte

Section 2: Sector Type Number

Section 2: Number of Sectors

Section 2: Block Protection Register Bit Start Location

Section 2: Bloc Protection Register Bit End Location

64-Kbyte

Section 3: Sector Type Number

Section 3: Number of Sectors

Section 3: Block Protection Register Bit Start Location

Section 3: Block Protection Register Bit End Location

32-Kbyte

Section 4: Sector Type Number

Section 4: Number of Sectors

Section 4: Block Protection Register Bit Start Location

Section 4: Block Protection Register Bit End Location

8-Kbyte (Top Block)

Section 5: Sector Type Number

Section 5: Number of Sectors

Section 5: Block Protection Register Bit Start Location

Section 5: Block Protection Register Bit End Location

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