I'm working on a project that has a single channel 12bit ADC and a display module; the cheapest way to get a 12 bit ADC and microcontroller appears to be the Arduino M0; I've found some reasonably priced variants with the STM32F003F4 microcontroller, but there appears to be only 13 IO lines. I have a nice T6963 module that I want to use, but the data indicates that 13 control / data lines are required, which I don't have. In such a minimal circuit, can lines such as CS and /RD be tied to a fixed voltage?