SLVSF02E march 2019 – may 2023 TPS23881
PRODUCTION DATA
COMMAND = 0Fh with 1 Data Byte, Read Only
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| REQUESTED CLASS Ch4 | DETECT Ch4 | ||||||
| R-0 | R-0 | R-0 | R-0 | R-0 | R-0 | R-0 | R-0 |
| LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
Bit Descriptions: These bits represent the most recent "requested" classification and detection results for channel n. These bits are cleared when channel n is turned off.
| Bit | Field | Type | Reset | Description | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 7–4 | RCLASS Ch-n | R | 0 | Most recent classification
result on channel n. The selection is as following: |
||||||
| RCLASS Ch-n | Requested Class | |||||||||
| 0 | 0 | 0 | 0 | Unknown | ||||||
| 0 | 0 | 0 | 1 | Class 1 | ||||||
| 0 | 0 | 1 | 0 | Class 2 | ||||||
| 0 | 0 | 1 | 1 | Class 3 | ||||||
| 0 | 1 | 0 | 0 | Class 4 | ||||||
| 0 | 1 | 0 | 1 | Reserved – read as Class 0 | ||||||
| 0 | 1 | 1 | 0 | Class 0 | ||||||
| 0 | 1 | 1 | 1 | Class Overcurrent | ||||||
| 1 | 0 | 0 | 0 | Class 5 - 4-Pair Single Signature | ||||||
| 1 | 0 | 0 | 1 | Class 6 - 4-Pair Single Signature | ||||||
| 1 | 0 | 1 | 0 | Class 7 - 4-Pair Single Signature | ||||||
| 1 | 0 | 1 | 1 | Class 8 - 4-Pair Single Signature | ||||||
| 1 | 1 | 0 | 0 | Class 4+ - Type-1 Limited | ||||||
| 1 | 1 | 0 | 1 | Class 5 - 4-Pair Dual Signature | ||||||
| 1 | 1 | 1 | 0 | Reserved | ||||||
| 1 | 1 | 1 | 1 | Class Mismatch | ||||||
| 3–0 | DETECT Ch-n | R | 0 | Most recent detection result
on channel n. The selection is as following: |
||||||
| DETECT Ch-n | Detection Status | |||||||||
| 0 | 0 | 0 | 0 | Unknown | ||||||
| 0 | 0 | 0 | 1 | Short-circuit | ||||||
| 0 | 0 | 1 | 0 | Reserved | ||||||
| 0 | 0 | 1 | 1 | Too Low | ||||||
| 0 | 1 | 0 | 0 | Valid | ||||||
| 0 | 1 | 0 | 1 | Too High | ||||||
| 0 | 1 | 1 | 0 | Open Circuit | ||||||
| 0 | 1 | 1 | 1 | Reserved | ||||||
| 1 | 1 | 1 | 0 | MOSFET fault | ||||||
“Requested” vs. “Assigned” Classification: The “requested” class is the classification the PSE measures during Mutual Identification prior to turn on, whereas the “assigned” class is the classification level the channel was powered on with based on the Power Allocation setting in register 0x29h. The “assigned” classification values are available in registers 0x4C-4F
Due to the need to power on after 1 class finger, the "Class 4+ - Type 1 Limited" Requested Class is reported anytime a Class 4 or higher PD is powered with register 0x29 configured for 15.5W.
For a 4-pair single signature device, both channels will report the requested PD classification within 5ms after classification is completed. However, only the channel that classification was measured on will have the CLSCn bit set in register 0x04h
For a 4-pair dual signature device each channel will reports is own individually requested PD classification within 5ms after classification is completed on each Channel
Upon being powered, devices that present a class 0 signature during discovery will be given an assigned class of "Class 3"
In Manual/Diagnostic mode, Class 8 4-pair single signature loads will be reported as "Class 5DS" when classification is only enabled on one channel.