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ST10F296 数据表(PDF) 78 Page - STMicroelectronics |
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ST10F296 数据表(HTML) 78 Page - STMicroelectronics |
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78 / 346 page  Obsolete Product(s) - Obsolete Product(s) The bootstrap loader ST10F296E 78/346 6.4 Standard bootstrap with CAN 6.4.1 Features The bootstrap via CAN has the same overall behavior as the bootstrap via UART: ● Same bootstrapping steps ● Same bootstrap method: To analyze the timing of a predefined frame, send back an acknowledge frame (on request only), load a fixed number of bytes and then run. ● Same functionalities: To boot with different crystals and PLL ratios. Figure 12. CAN bootstrap loader sequence 1. BSL initialization time > 1ms @ fCPU = 40 MHz 2. Zero frame (CAN message: standard ID = 0, DLC = 0) sent by host 3. CAN message (standard ID = E6h, DLC = 3, Data0 = D5h, Data1-Data2 = IDCHIP_low-high) sent by ST10F296E on request. 4. 128 bytes of code/data, sent by host 5. CAN1_TxD is only driven a certain time after reception of the zero byte (1.3 ms @ fCPU = 40 MHz). 6. Internal boot ROM/Test-Flash The bootstrap loader may be used to load the complete application software into ROM-less systems. It may also load temporary software into complete systems for testing or calibration. In addition, it may be used to load a programming routine for Flash devices. The BSL mechanism may be used for standard system start-ups as well as for special occasions like system maintenance (firmware update), end-of-line programming or testing. RSTIN CAN1_TxD Int. boot ROM / Test-Flash BSL-routine 128 bytes 2) 3) CAN1_RxD CSP:IP user software 4) 6) P0L.4 1) 5) Obsolete Product(s) - Obsolete Product(s) |
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