PSoC1 - 32.768-kHz External Crystal Oscillator Application Circuit Using the CY3210 Kit

PSoC1 - 32.768-kHz External Crystal Oscillator Using the CY3210 Kit. The PSoC 1 microcontroller's external crystal oscillator (ECO) can be used as a reference for timekeeping and other low-speed (<32 kHz) operations. It can also act as the reference for the phase-locked loop (PLL) mode of the internal main oscillator (IMO). The PLL uses the 32.768-kHz input to generate a more accurate 24-MHz clock signal