ST7FSCR14M1 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

ST7FSCR14M1

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

ST7SCR

FLASH PROGRAM MEMORY (Cont’d)

4.4 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 7). For more details on

the pin locations, refer to the device pinout de-

scription.

ICP needs six signals to be connected to the pro-

gramming tool. These signals are:

– VSS: device power supply ground

– VDD: for reset by LVD

– OSCIN: to force the clock during power-up

– ICCCLK: ICC output serial clock pin

– ICCDATA: ICC input serial data pin

– VvoPlPta: gIeC.C mode selection and programming

Figure 7. Typical ICP Interface

If ICCCLK or ICCDATA are used for other purpos-

es in the application, a serial resistor has to be im-

plemented to avoid a conflict in case one of the

other devices forces the signal level.

Note: To develop a custom programming tool, re-

fer to the ST7 FLASH Programming and ICC Ref-

erence Manual which gives full details on the ICC

protocol hardware and software.

4.5 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 USB 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 protected to allow recovery

in case errors occur during the programming oper-

ation.

PROGRAMMING TOOL

ICC CONNECTOR

ICC Cable

ICP PROGRAMMING TOOL CONNECTOR

HE10 CONNECTOR TYPE

97 5 31

10 8 6 4 2

APPLICATION BOARD

10kΩ

CL2

CL1

TO

THE

4.7kΩ APPLICATION

ST7

15/102

1

Share Link: