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ST72324BK 数据表(PDF) 21 Page - STMicroelectronics |
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ST72324BK 数据表(HTML) 21 Page - STMicroelectronics |
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21 / 188 page ![]() ST72324B Flash program memory 21/188 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 customized (number of bytes to program, program locations, or selection serial communication interface for downloading). When using an STMicroelectronics or third-party programming tool that supports ICP and the specific microcontroller device, the user needs only to implement the ICP hardware interface on the application board (see Figure 8). For more details on the pin locations, refer to the device pinout description. 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, (such as user-defined strategy for entering programming mode, choice of communications protocol used to fetch the data to be stored). 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 protected to allow recovery in case errors occur during the programming operation. 4.7 Related documentation For details on Flash programming and ICC protocol, refer to the ST7 Flash Programming Reference Manual and to the ST7 ICC Protocol Reference Manual. 4.7.1 Flash Control/Status Register (FCSR) This register is reserved for use by programming tool software. It controls the Flash programming and erasing operations. FCSR Reset value: 0000 0000 (00h) 7 654 32 10 0 000 00 00 R/W R/W R/W R/W R/W R/W R/W R/W Table 4. Flash control/status register address and reset value Address (Hex) Register label 7 6 5 4 3 2 1 0 0029h FCSR reset value 0 00 00 000 |
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