Ahhh, regardless of the battery voltage, the digital o/p pin only reaches 2.91 volts.
I have tried the Neutronics B/W N3310LCP lcd display, powered it from a single digital o/p line P24 and with a total current consumption of 6.69 mA. and works brill after a hardware reset on MBED.
So it's obvious that the TFT display needs a higher voltage so any ideas how to simply translate the 2.9 v from the digital i.o line to 3.3 v using hardware?
Hmmm, maybe I will use the B/W display for my project since I have not tested the readability of the TFT display in bright sunlight.
Now I understand why my little hobby brings me great joy - much fun in debugging a project !
I am trying to power a Mikroelectronica TFT LCD display (3.3 volts, 7 ma) from the P22 pin (configured as a digital o/p pin on the Mbed. The display fails to power up when the MBED is reset.The display functions normally when powered from P40 (3.3 v regulated o/p).What am I doing wrong? The backlight is PWM powered from P21 with a series resistor to limit the LED current.