I'm having difficulties identifying a schematic symbol. I spotted this while going through the STM32L series reference manual on page 172 located HERE.
Here is the symbol in question, and the symbol as it appears in the document:
It's obvious that it's some sort of electronically switchable resistor, I'm just uncertain what the proper name for it is. I thought it was a Voltage Controlled Resistor however I've generally seen those in schematics as the actual FET, as opposed to a symbol like this. My searches haven't turned up anything.
I know they're the pullups/pulldowns for the port, I just have never seen that symbol before.
Does anyone recognize this symbol or know what the proper name for it is?