4.14.3.4 UTMI High-Speed Trimming Register
This register can only be written if the WPEN bit is cleared in the Write Protection Mode register.
| Name: | SFR_UTMIHSTRIM |
| Offset: | 0x34 |
| Reset: | 0x00044433 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| SLOPE2[2:0] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 1 | 0 | 0 | ||||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| SLOPE1[2:0] | SLOPE0[2:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | 1 | 0 | 0 | 1 | 0 | 0 | |||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| Access | |||||||||
| Reset |
Bits 8:10, 12:14, 16:18 – SLOPEx UTMI HS PORTx Transceiver Slope Trimming
Adjusts HS transceiver output slope for PORTx.
These bits are duplicated for each port because the HS slope depends on the PCB line length. Short lines appear as lumped capacitances and exhibit a slower rise/fall time, while longer lines appear as transmission lines with sharper edges.
| Value | Name |
|---|---|
| 0 | Faster |
| 1 | – |
| 2 | – |
| 3 | – |
| 4 | Default |
| 5 | – |
| 6 | – |
| 7 | Slower |