ST7LUS5 datasheet(114/124 Pages) STMICROELECTRONICS

114 / 124 page

Device configuration and ordering information

ST7LUS5, ST7LU05, ST7LU09

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Device configuration and ordering information

Each device is available for production in user programmable versions (Flash) as well as in

factory coded versions (FASTROM).

ST7PLUxx devices are Factory Advanced Service Technique ROM (FASTROM) versions:

They are factory-programmed XFlash devices.

ST7FLUxx XFlash devices are shipped to customers with a default program memory

content (FFh).

The FASTROM factory coded parts contain the code supplied by the customer. This implies

that Flash devices have to be configured by the customer using the option bytes while the

FASTROM devices are factory-configured.

14.1

Flash devices

14.1.1

Flash configuration

The two option bytes are used to select the hardware configuration of the microcontroller.

The option bytes can be accessed only in programming mode (for example, using a

standard ST7 programming tool).

Option byte 0

Table 87.

Flash option bytes

Option byte 0

Option byte 1

654

3210

765

4321

Reserved

SEC0[1:0]

FMP

CKSEL[1:0]

Reserved

LVD[1:0]

WDG

HALT

Default

value

111

0000

001

0111

Table 88.

Option byte 0 bit description

Bit

Name

Function

OPT7:4

Reserved, must always be 1.

OPT3:2

SEC0[1:0]

Sector 0 size definition

These option bits indicate the size of sector 0 as follows:

00: 0.5 Kbyte

01: 1 Kbyte

1- : 2 Kbytes

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