The recommended crystal oscillator frequency for the LM3S5R31-IBZ80-C5 is 12 MHz, as specified in the datasheet. However, it's also possible to use other frequencies such as 16 MHz or 20 MHz, but this may require adjustments to the PLL settings and clock configuration.
The GPIO pins on the LM3S5R31-IBZ80-C5 can be configured for analog or digital functionality using the GPIO peripheral registers. Specifically, the GPIOAFSEL register is used to select the analog or digital function for each pin, and the GPIODIR register is used to set the direction of the pin as input or output.
The maximum current that can be sourced or sunk by the GPIO pins on the LM3S5R31-IBZ80-C5 is 4 mA per pin, as specified in the datasheet. However, it's recommended to limit the current to 2 mA per pin to ensure reliable operation and to prevent overheating.
The internal flash memory on the LM3S5R31-IBZ80-C5 can be used for storing and executing code by configuring the flash controller and setting the flash memory as the program memory space. This can be done using the Flash Control Register (FCR) and the Program Flash Memory (PFM) registers.
The power consumption of the LM3S5R31-IBZ80-C5 varies depending on the operating mode. In active mode, the power consumption is typically around 150 mA/MHz. In sleep mode, the power consumption is around 10 uA, and in deep sleep mode, it's around 1 uA. The exact power consumption can be calculated using the power consumption equations provided in the datasheet.
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