USB on-the-go full-speed (OTG_FS) RM0351
1672/1830 DocID024597 Rev 5
47.15.13 OTG core ID register (OTG_CID)
Address offset: 0x03C
Reset value: 0x0000 3X00 This is a read only register containing the Product ID.
Bit 3 PS2DET: DM pull-up detection status
This bit is active only during PD and gives the result of comparison between DM voltage
level and VLGC threshold. In normal situation, the DM level should be below this threshold.
If it is above, it means that the DM is externally pulled high. This can be caused by
connection to a PS2 port (which pulls-up both DP and DM lines) or to some proprietary
charger not following the BCD specification.
0: Normal port detected (connected to SDP, CDP or DCP)
1: PS2 port or proprietary charger detected
Bit 2 SDET: Secondary detection (SD) status
This bit gives the result of SD.
0: CDP detected
1: DCP detected
Bit 1 PDET: Primary detection (PD) status
This bit gives the result of PD.
0: no BCD support detected (connected to SDP or proprietary device).
1: BCD support detected (connected to CDP or DCP).
Bit 0 DCDET: Data contact detection (DCD) status
This bit gives the result of DCD.
0: data lines contact not detected
1: data lines contact detected
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
PRODUCT_ID
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
PRODUCT_ID
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:0 PRODUCT_ID: Product ID field
Application-programmable ID field.
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