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Minimal connections to drive T6963 LCD module

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CambridgeMart:
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?

ebclr:
You can easily add more i/o lines

https://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf

coromonadalix:
You can go down to 7 pins, i think with some shift registers

https://github.com/Orabig/Rasp-T6963C

CambridgeMart:
Thanks coromonadalix, that's really useful.

Scrts:

--- Quote from: CambridgeMart on August 03, 2020, 07:01:55 pm ---the STM32F003F4 microcontroller, but there appears to be only 13 IO lines.
--- End quote ---

I understand that you've made a mistype and had STM32F030F4 in your mind? TSSOP20 package? In that case, based on STM32F030F4 datasheet page 10 Table 2, you can have 15 GPIOs. And indeed, if you look into page 27, you can count 15 GPIOs, however the only limitation is that you will have to utilize internal oscillator in order to free up 2 GPIOs PF0/PF1 that are otherwise dedicated to the external XTAL.

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