Multi pin chassis connectors

ryryog25 · January 30, 2025, 5:05pm

I’ll link this in here also

Proffieboard V1 and V2: From Datasheet Table 22: 6.3.1 “General Operating Conditions” All I/O except TT_xx: Min(Min(VDD, VDDA, VDDUSB, VLCD)+3.6V, 5.5V) The translation being all I/O except TT_xx are 5V tolerant. TT_xx IO are 3.3V tolerant only (with a ±0.3 tolerance for variance) The TT_xx Pins on Proffieboard V1/V2: (the ones that aren’t 5V tolerant) Extracted From Datasheet Table 15 MCU Pin V1 Function V2 Function 13 Free1/Data4 vtest, internal 14 vtest, internal Free1/Data4 15 SD Card SCLK, internal SD Card SCLK, internal So the only effective pin you can’t use as a pulldown button pin (besides the obvious) on both the V1 and V2 are the respective Data4 pins. Proffieboard V3: From Datasheet Table 23 6.3.1 “General Operating Conditions” All I/O except TT_xx: Min(Min(VDD, VDDA, VDDUSB)+3.6V, 5.5V) Similarly this means that all non-TT_xx pins are 5V tolerant, and still TT_xx I/O are 3.3V tolerant only. The TT_xx Pins on Proffieboard V3: (the ones that aren’t 5V tolerant) Extracted From Datasheet Table 16 MCU Pin V3 Function G3 SD Power Enable, internal H3 Data4 F4 Unused So once again, the pin you can’t use on the V3 is still Data4.