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This guide describes how various 281x digital signal processor (DSP) system controls and interrupts work with peripherals. It includes information on the:

  • Flash and one-time programmable (OTP) memories
  • Code security module (CSM), which is a security feature incorporated in 28x devices
  • Clocking mechanisms including the oscillator, PLL, the watchdog function, and the low-power modes
  • GPIO MUX registers used to select the operation of shared pins
  • Peripheral frames and the device emulation registers
  • Peripheral interrupt expansion (PIE) block that multiplexes numerous interrupt sources into a smaller set of interrupt inputs