In addition, VTT is limited to 0.95 V max once power ramp is finished, AND • Vref tracks VDDQ/2. OR • Apply VDD without any slope reversal before or at the same time as VDDQ. • Apply VDDQ without any slope reversal before or at the same time as VTT & Vref. • The ...
K 2022-09 15 / 73 1.8.1 Voltage Ramp and Device Initialization (cont'd) Data Sheet SCE11NxGxxxAF 4Gbit/8Gbit/2Gbit LPDDR4 SDRAM NOTES : 1. Training is optional and may be done at the system architects discretion. The training sequence after ZQ_CAL Latch(Th, Sequence7~9) in Figure ...
K 2022-09 15 / 73 1.8.1 Voltage Ramp and Device Initialization (cont'd) Data Sheet SCE11NxGxxxAF 4Gbit/8Gbit/2Gbit LPDDR4 SDRAM NOTES : 1. Training is optional and may be done at the system architects discretion. The training sequence after ZQ_CAL Latch(Th, Sequence7~9) in Figure ...
VDD2 must ramp at the same time or earlier than VDDQ. Table 7 - Voltage Ramp Conditions After Applicable Conditions Ta is reached VDD1 must be greater than VDD2 VDD2 must be greater than VDDQ - 200 mV NOTE 1 Ta is the point when any power supply first reaches 300 mV. NOTE 2 ...
K 2022-09 15 / 73 1.8.1 Voltage Ramp and Device Initialization (cont'd) Data Sheet SCE11NxGxxxAF 4Gbit/8Gbit/2Gbit LPDDR4 SDRAM NOTES : 1. Training is optional and may be done at the system architects discretion. The training sequence after ZQ_CAL Latch(Th, Sequence7~9) in Figure ...
Table 11 - Timing Parameters Power Off Symbol tPOFF Value Min Max -2 Unit s Comment Maximum Power-off ramp item UniIC_Techdoc, Rev. H 2022-09 18 / 72 1.9 Mode Register Definition Data Sheet SCE11RxGxxxAF 4Gbit/8Gbit/2Gbit LPDDR4X SDRAM Table 12 shows the mode registers for LPDDR4X...