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ZBasic System Library 104 ZX Microcontroller Family Most ZX processors contain a single analog-to-digital converter thus allowing only one conversion to be performed at a time. The conversion process takes approximately 220uS during which time the calling task will be awaiting conversion completion. Compatibility Although the BasicX manual indicates that that it is not necessary to configure the pin to be an input before calling, tests indicate that it is, in fact, necessary to do so. Consequently, the behavior of this implementation matches the actual behavior of the BasicX platform. The second and third forms are not available in BasicX mode.