ST7262 datasheet(16/132 Pages) STMICROELECTRONICS

Part #	ST7262

Description	LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI

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FLASH PROGRAM MEMORY (Cont’d)

4.5 ICP (In-Circuit Programming)

To perform ICP the microcontroller must be

switched to ICC (In-Circuit Communication) mode

by an external controller or programming tool.

Depending on the ICP code downloaded in RAM,

Flash memory programming can be fully custom-

ized (number of bytes to program, program loca-

tions, or selection serial communication interface

for downloading).

When using an STMicroelectronics or third-party

programming tool that supports ICP and the spe-

cific microcontroller device, the user needs only to

implement the ICP hardware interface on the ap-

plication board (see Figure 9). For more details on

the pin locations, refer to the device pinout de-

scription.

4.6 IAP (In-Application Programming)

This mode uses a BootLoader program previously

stored in Sector 0 by the user (in ICP mode or by

plugging the device in a programming tool).

This mode is fully controlled by user software. This

allows it to be adapted to the user application, (us-

er-defined strategy for entering programming

mode, choice of communications protocol used to

fetch the data to be stored, etc.). For example, it is

possible to download code from the SPI, SCI, USB

or CAN interface and program it in the Flash. IAP

mode can be used to program any of the Flash

sectors except Sector 0, which is write/erase pro-

tected to allow recovery in case errors occur dur-

ing the programming operation.

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.

70

000000

00

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