36.7.55 PHY Control Register 18
Note: The USB PHY values must be loaded from the CAL OTP area into
the USB PHY registers by software, before enabling the USB, to achieve the specified
accuracy.
Symbol | Description | Symbol | Description | Symbol | Description |
---|---|---|---|---|---|
R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
K | Write to clear | S | Software settable bit | — | — |
Name: | PHY18 |
Offset: | 0x1518 |
Reset: | 0x00000008 |
Property: | PAC Write-Protection |
Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
Access | |||||||||
Reset |
Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
Access | |||||||||
Reset |
Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
Access | |||||||||
Reset |
Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
ODT[1:0] | |||||||||
Access | R/W | R/W | |||||||
Reset | 0 | 0 |
Bits 1:0 – ODT[1:0] On Die Termination
Sets the lowest bit of the on die termination compensation voltage reference.
Settings include the lower bits (PHY14.7) and the upper bits (PHY18.0:1).
Value | Description |
---|---|
111 | 362.5 mV |
110 | 375 mV |
101 | 387.5 mV |
100 | 450 mV |
011 | 437.5 mV |
010 | 425 mV |
001 | 412.5 mV |
000 | 400 mV |