NXP Semiconductors freescale K51 Series Reference Manual

44.4.5 USBDCD_TIMER1Address: USBDCD_TIMER1 is 4003_5000h base + 14h offset = 4003_5014hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0R 0 TDCD_DBNC 0 TVDPSRC_ONWReset 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0USBDCD_TIMER1 field descriptionsField Description31–26ReservedThis read-only field is reserved and always has the value zero.25–16TDCD_DBNCTime Period to Debounce D+ SignalSets the amount of time (in ms) to debounce the D+ signal during the data pin contact detection phase(while IDP_SRC and RDM_DWN are enabled). Valid values are 1-1023, but the USB Battery ChargingSpecification requires a minimum value of 10 ms.15–10ReservedThis read-only field is reserved and always has the value zero.9–0TVDPSRC_ONTime Period Comparator EnabledSets the amount of time (in ms) that VDP_SRC, IDM_SINK, and the D-/VDAT_REF comparator areenabled and connected to the D+/D- lines during the charging port detection phase of the sequence. Validvalues are 1-1023, but the USB Battery Charging Specification requires a minimum value of 40 ms.44.4.6 USBDCD_TIMER2TIMER2 contains timing parameters. Note that register values can be written that are notcompliant with the USB Battery Charging Specification v1.1, so care should be takenwhen overwriting the default values.Address: USBDCD_TIMER2 is 4003_5000h base + 18h offset = 4003_5018hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0R 0TVDPSRC_CON0 CHECK_DMWReset 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1USBDCD_TIMER2 field descriptionsField Description31–26ReservedThis read-only field is reserved and always has the value zero.Table continues on the next page...Chapter 44 USB Device Charger Detection Module (USBDCD)K51 Sub-Family Reference Manual, Rev. 6, Nov 2011Freescale Semiconductor, Inc. 1103