notro wrote:The BeagleBone Black 4" LCD cape has an onboard 74AVC32T245: 32-bit dual supply translating transceiver with configurable voltage translation; 3-state
It is used on all the LCD signals, and since both the display and the BBB works at 3.3V it doesn't act as a level shifter.
What's the purpose of this arrangement? To clean up the signals? (your display also has a 74LVC245, but the purpose here is level shifting)
Some Beagle boards run 1.8v I/O so I guess the shifter is to allow the cape to work with other models?