3.3.4 I/O Lines Description

Table 3-19. DDR/LPDDR I/O Lines Description
NameFunctionTypeActive Level
DDR/LPDDR Controller
VDDIODDRPower supply of memory interfacePower
DDR_VREFReference voltageInput
DDR_ZQCalibration referenceInput
DDR_ODTOn-Die-TerminationOutput
DDR_D[15:0]Data busI/O
DDR_A[15:0]Address busOutput
DDR_DQM[1:0]Data maskOutput
DDR_DQS[1:0]Data strobeI/O
DDR_DQSN[1:0]Negative data strobeI/O
DDR_CSNChip selectOutputLow
DDR_RESETNDDR3 active low asynchronous resetOutputLow
DDR_CLK, DDR_CLKNDifferential clockOutput
DDR_CKEClock enableOutputHigh
DDR_RASNRow signalOutputLow
DDR_CASNColumn signalOutputLow
DDR_WENWrite enableOutputLow
DDR_BA[2:0]Bank SelectOutput