35.1.3 IO Lines Description

Table 35-1. DDR/LPDDR I/O Lines Description
Name Function Type Active Level
DDR/LPDDR Controller
VDDIODDR Power Supply of memory interface Power
DDR_VREF Reference Voltage Input
DDR_CAL Calibration reference Input
DDR_D[31:0] Data Bus I/O
DDR_A[13:0] Address Bus Output
DDR_DQM[3:0] Data Mask Output
DDR_DQS[3:0] Data Strobe I/O
DDR_DQSN[3:0] Negative Data Strobe I/O
DDR_CS Chip Select Output Low
DDR_RESETN DDR3 Active Low Asynchronous Reset Output Low
DDR_CLK, DDR_CLKN Differential Clock Output
DDR_CKE Clock enable Output High
DDR_RAS Row signal Output Low
DDR_CAS Column signal Output Low
DDR_WE Write enable Output Low
DDR_BA[2:0] Bank Select Output