Port numbering is a little funky #1

New Issue

brendanhaines · 2025-06-26T21:30:23-06:00

brendanhaines commented

2025-06-26 21:30:23 -06:00

This board was maybe thrown together in a few hours at midnight.

I intentionally used D1 through D3 but not D0 to sorta match the pinout of the minicircuits eval board (TB-927+ datasheet) for this switch IC (HSWA4-63DR+). It turns out I mirrored things (3V3 & GND are swapped) but I'll probably never buy the eval board and don't really care.

I didn't look at the switch truth table. We really only need 2 bit control, not 3.
It may actually be beneficial to have 3-bit control after all if an all off state is ever useful.

Assuming we use 2-bit control, RF4 is really more like RF0.

This board was maybe thrown together in a few hours at midnight. I intentionally used `D1` through `D3` but not `D0` to sorta match the pinout of the minicircuits eval board (TB-927+ [datasheet](https://www.minicircuits.com/pcb/WTB-927+_P02.pdf)) for this switch IC (HSWA4-63DR+). It turns out I mirrored things (3V3 & GND are swapped) but I'll probably never buy the eval board and don't really care. I didn't look at the switch truth table. We really only need 2 bit control, not 3. It may actually be beneficial to have 3-bit control after all if an _all off_ state is ever useful. Assuming we use 2-bit control, RF4 is really more like RF0.

Sign in to join this conversation.

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: brendanhaines/cerberus_sp4t#1