mux - Multiplex Control

Warning

The Multiplexer sub-system of the PLT only tolerates voltages up to 5.5V.

Control which signals are routed through the multiplex channels. This command is PLT-300A only.

There are two related but distinct operations:

mux <channel> <signal> assigns a signal to one of the 4 multiplex channels (0..3), which then feeds into the ADC/DMM measurement paths for use with measure - Probe Measurement. Any signal previously assigned to that channel is replaced.
mux connect|disconnect <signal> physically connects or disconnects a DATPxx/DDTPxx probe to/from the Multiplexer sub-system’s relay matrix. A DDTPxx pin must be connected before it can be used as a GPIO (see pin - Digital pin control); disconnect removes it from the mux again. A DATPxx pin (DATP00..``DATP06``) must likewise be connected before it can be measured as voltageDATP00..``voltageDATP06`` (see measure - Probe Measurement). all connects or disconnects every connectable signal at once.

Usage:

- command: mux <channel> <signal>

- command: mux connect|disconnect all|<signal>

Argument	Description
channel	Multiplex channel index (`0`..``3``) to assign signal to.
connect	Connect signal (or `all` signals) to the Multiplexer sub-system’s relay matrix.
disconnect	Disconnect signal (or `all` signals) from the Multiplexer sub-system’s relay matrix.
signal	Probe or signal name, from the tables below.
all	All signals that can be connected to or disconnected from the multiplexer (see the second table below).

The following signals and probes can be assigned to a multiplex channel:

signal	MUX	Description
`DATP00`…`DATP06`	0, 1	Direct Analog Test Probes
`RATP00`…`RATP31`	0, 1	Routed Analog Test Probes
`DDTP00`…`DDTP08`	2, 3	Direct Digital Test Probes
`RVREF`	all	Impedance measurement, reference voltage
`RA`	all	Impedance measurement, test voltage
`GND`	all	Ground
`1V8OUT`	all	1.8V power rail
`3V3OUT`	all	3.3V power rail
`5VOUT`	all	5.0V power rail

Since the multiplexer only tolerates up to 5V, the following signal probes can be connected or disconnected from the mux:

signal	Description
`DATP00`…`DATP06`	Direct Analog Test Probes
`DDTP00`…`DDTP08`	Direct Digital Test Probes

Examples