What is the maximum reliable baud rate that the serial bootloader will operate at?I am aware than AN3155 says that the max tested is 115200 but that's too slow for the production rates we need. How much faster can it go? I would like to go at least...
STM32H745 DS indicates there are these signals:CANFD1_TXFD_MODECANFD1_RXFD_MODECANFD2_TXFD_MODECANFD2_RXFD_MODENo mention is made in the DS for their purpose, nor in AN5348 "FDCAN peripheral on STM32 devices". The signals are not mentioned at all in...
STM32H745 datasheet says:RTC_OUT can come out PB2 port. No other port is listed in the DS for RTC_OUT. See table 8, page 62. RTC_OUT also listed in table 10, page 90, and note for PC13, page 92.STM32H745 reference manual says:RTC_OUT can be direc...
App note AN2606 on bootloader operation, figure 57, shows the flow chart for the STM32H74/75 series. One block is labeled "USB cable Detected". Exactly what is the criteria for this? Is it based on DP/DM states? Is it based on VBUS measurement? ...
Voltage translation occurs at the MISO, MOSI levels, then do the resistor in the target voltage domain. MISO, MOSI are unidirectional signals, so easily translated. This can occur even after isolation, say after ISO6xxx isolators are used which pro...
SPI is both write and read at the same time. With the resistor trick, MOSI drives the SWDIO through the resistor when the target is acting as an input, and MISO reads the target driving the SWDIO during reads (as well as echoing the MOSI output duri...
I've thought about how an SPI port can do SWD and here is my concept that I have not seen implemented. There is a small bit of electrical trickery to deal with the bidirectional nature of SWDIO. Here is the connection:SPI SCLK ties to SWCLK. This ...
