36.7.62 PHY Control Register 4C
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: | PHY4C |
Offset: | 0x154C |
Reset: | 0x00000000 |
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 | |
BSESSVALIDTUNE[1:0] | VBUSVALTUNE[2:0] | ||||||||
Access | R/W | R/W | R/W | R/W | R/W | ||||
Reset | 0 | 0 | 0 | 0 | 0 |
Bits 7:6 – BSESSVALIDTUNE[1:0] B Session Valid Reference Tune
Settings include the lower bits (PHY4C.6:7) and the upper bit (PHY50.0).
Value | Description |
---|---|
111 | 2.16 V |
110 | 2.58 V |
101 | 2.52 V |
100 | 2.46 V |
011 | 2.22 V |
010 | 2.28 V |
001 | 2.34 V |
000 | 2.4 V (Default) |
Bits 2:0 – VBUSVALTUNE[2:0] VBUS Valid Reference Tune
Value | Description |
---|---|
111 | 4.3 V |
110 | 4.65 V |
101 | 4.6 V |
100 | 4.55 V |
011 | 4.3 V |
010 | 4.4 V |
001 | 4.5 V |
000 | 4.45 V |