This field configures and enables the various IEEE specified test modes. For a
description of the test modes, refer to Clause 147.5.2 of the IEEE
802.3cgTM-2019 Amendment 5: Physical Layers Specifications and
Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a
Single Balanced Pair of Conductors.
| Value | Description |
|---|
000 | Normal
(non-test) operation |
001 | Test mode 1
- Transmitter output voltage, timing jitter |
010 | Test mode 2
- Transmitter output droop |
011 | Test mode 3
- Transmitter PSD mask |
100 | Test mode 4
- Transmitter high impedance mode |
101 | Reserved |
11x | Reserved |
