NXP Semiconductors freescale K51 Series Reference Manual

Address: SDHC_PROCTL is 400B_1000h base + 28h offset = 400B_1028hBit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16R 0WECRMWECINSWECINT 0IABGRWCTLCREQSABGREQWReset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0R 0DMASCDSSCDTLEMODED3CDDTWLCTLWReset 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0SDHC_PROCTL field descriptionsField Description31–27ReservedThis read-only field is reserved and always has the value zero.26WECRMWakeup Event Enable On SD Card RemovalThis bit enables a wakeup event, via IRQSTAT[CRM]. FN_WUS (Wake Up Support) in CIS does noteffect this bit. When this bit is set, the IRQSTAT[CRM] and the SDHC interrupt can be asserted withoutSD_CLK toggling. When the wakeup feature is not enabled, the SD_CLK must be active in order to assertthe IRQSTAT[CRM] and the SDHC interrupt.0b Disabled1b Enabled25WECINSWakeup Event Enable On SD Card InsertionThis bit enables a wakeup event, via IRQSTAT[CINS]. FN_WUS (Wake Up Support) in CIS does noteffect this bit. When this bit is set, the IRQSTATEN[CINSEN] and the SDHC interrupt can be assertedwithout SD_CLK toggling. When the wakeup feature is not enabled, the SD_CLK must be active in orderto assert the IRQSTATEN[CINSEN] and the SDHC interrupt.0b Disabled1b Enabled24WECINTWakeup Event Enable On Card InterruptThis bit enables a wakeup event, via IRQSTAT[CINT]. This bit can be set to 1 if FN_WUS (Wake UpSupport) in CIS is set to 1. When this bit is set, the card interrupt status and the SDHC interrupt can beasserted without SD_CLK toggling. When the wakeup feature is not enabled, the SD_CLK must be activein order to assert the card interrupt status and the SDHC interrupt.0b Disabled1b Enabled23–20ReservedThis read-only field is reserved and always has the value zero.19IABGInterrupt At Block GapTable continues on the next page...Chapter 49 Secured digital host controller (SDHC)K51 Sub-Family Reference Manual, Rev. 6, Nov 2011Freescale Semiconductor, Inc. 1325