ST7LITE0 datasheet(109/122 Pages) STMICROELECTRONICS

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ST7LITE0, ST7SUPERLITE

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15 DEVICE CONFIGURATION AND ORDERING INFORMATION

Each device is available for production in user pro-

grammable versions (FLASH) as well as in factory

coded versions (FASTROM).

ST7PLITE0x and ST7PLITES2/S5 devices are

Factory Advanced Service Technique ROM (FAS-

TROM) versions: they are factory-programmed

XFlash devices.

ST7FLITE0x and ST7FLITES2/S5 XFlash devices

are shipped to customers with a default program

memory content (FFh). The OSC option bit is pro-

grammed to 0 by default.

The FASTROM factory coded parts contain the

code supplied by the customer. This implies that

FLASH devices have to be configured by the cus-

tomer using the Option Bytes while the FASTROM

devices are factory-configured.

15.1 OPTION BYTES

The two option bytes allow the hardware configu-

ration of the microcontroller to be selected.

The option bytes can be accessed only in pro-

gramming mode (for example using a standard

ST7 programming tool).

OPTION BYTE 0

Bit 7:4 = Reserved, must always be 1.

Bit 3:2 = SEC[1:0]

Sector 0 size definition

These option bits indicate the size of sector 0 ac-

cording to the following table.

Note 1: Configuration available for ST7LITE0 de-

vices only.

Bit 1 = FMP_R

Read-out protection

This option indicates if the FLASH program mem-

ory and Data EEPROM is protected against pira-

cy. The read-out protection blocks access to the

program and data areas in any mode except user

mode and IAP mode. Erasing the option bytes

when the FMP_R option is selected will cause the

whole memory to be erased first, , and the device

can be reprogrammed. Refer to Section 4.5 and

the ST7 Flash Programming Reference Manual for

more details.

0: Read-out protection off

1: Read-out protection on

Bit 0 = FMP_W

FLASH write protection

This option indicates if the FLASH program mem-

ory is write protected.

Warning: When this option is selected, the pro-

gram memory (and the option bit itself) can never

be erased or programmed again.

0: Write protection off

1: Write protection on

Sector 0 Size

SEC1

SEC0

0.5k

1.5k 1)

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