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32-bit microcontroller IP. The ARM company which designs the ARM cores doesn't make controllers itself, but licences the IP to other manufacturers. ARM is the leading 32-bit controller and is available from tens of suppliers.
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Bit banding in Arm cortex M4
I am confused about the concept of using a pin offset in bit banding. EG, given that PORTA has a base address of 0x40004000 and the 5th bit has an offset of 0x0080, the address of the pin should be 0x …