5 of 5 people found this helpful
It seems that the UC3625 (based on the datasheet http://pdf.datasheetz.com/data/Integrated%20Circuits%20(ICs)/Motor%20and%20Fan%20Controllers,%20Drivers/296-11235-5-data… ) seems to be designed with motor control based on hall sensor feedback. The truth table is given as Table 2. Based on the application in Figure 14, it seems that there is no programming necessary, this is a fixed function IC with a number of inputs which can be used to change its operational mode. Likewise, the pin-out doesn't show any particular dedicated programming pins, so I suspect it can't be programmed like a microcontroller, instead it is "programmed" through the use of external components (e.g. resistors).
Thank you for your great advice,I would certainly follow it for development.