ST7SCR_07 datasheet(17/101 Pages) STMICROELECTRONICS

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ST7SCR

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FLASH PROGRAM MEMORY (Cont’d)

Note: If the ICCCLK or ICCDATA pins are only

used as outputs in the application, no signal isola-

tion is necessary. As soon as the Programming

Tool is plugged to the board, even if an ICC ses-

sion is not in progress, the ICCCLK and ICCDATA

pins are not available for the application. If they

are used as inputs by the application, isolation

such as a serial resistor has to implemented in

case another device forces the signal. Refer to the

Programming Tool documentation for recom-

mended resistor values.

4.6 Program Memory Read-out Protection

The read-out protection is enabled through an op-

tion bit.

For Flash devices, when this option is selected,

the program and data stored in the Flash memory

are protected against read-out (including a re-write

protection). When this protection is removed by re-

programming the Option Byte, the entire Flash

program memory is first automatically erased and

the device can be reprogrammed.

Refer to the Option Byte description for more de-

tails.

4.7 Related Documentation

For details on Flash programming and ICC proto-

col, refer to the ST7 Flash Programming Refer-

ence Manual and to the ST7 ICC Protocol Refer-

ence Manual

4.8 Register Description

FLASH CONTROL/STATUS REGISTER (FCSR)

Read/Write

Reset Value: 0000 0000 (00h)

This register is reserved for use by Programming

Tool software. It controls the FLASH programming

and erasing operations. For details on customizing

FLASH programming methods and In-Circuit Test-

ing, refer to the ST7 FLASH Programming and

ICC Reference Manual.

000

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