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LS1028 EVDD
to CPLD
PS_DDR_EN
VR500
PS_VDD_EN
LPFx6
to regulators
LS1028 PROG_MTR
HDR 1x2
LS1028 TA_PROG_SFP
HDR 1x2
1K
1K
2.5V @0.8A
POR_OUT_VR500_B
PS_3V3_EN
EVDD SWITCH
FPF1321UCX
3.3V/1.8V
VOUT2
VOUT1
LS1028
AVDD_CGA1
LS1028
AVDD_CGA2
LS1028
AVDD_PLAT
LS1028 DP_SAVDD
LS1028 AVDD_D1
LS1028
AVDD_PIXEL
1V0
1.0V @ 1.1A
QSGMII P HY VDD, VDDA
VOUT3
VOUT4
QSGMII P HY VDD25, VDD25A
DDR4 MEMORY VPP
LPFx2
X1VDD
1.35V
LS1028 X1VDD
1.35V @ 0.4A
AVDD_SD
1.35
LPFx4
LS1028 AVDD_SD1_PLL1
LS1028 AVDD_SD1_PLL2
2V5
1V35
B OARD COMPONENTS
CLOCKGEN VDD & VDDA
CPLD IO BANK3
UART TRANSCEIVER
XSPI MEMORIES
eMMC MEMORY IO VDD
MISC PARTS (BUFFERS & TRANSLATORS)
LS1028 OVDD, TH_VDD
1.8V @ 2.5A
{
EN
PORB
LDO2
LDO4
1V8
3.3V
1.8V
SD_VSEL
from LS1028
SD_VS EL: EVDD
0 : 3.3V
1 : 1.8V
GVDD
1.2V @ 5A
MC34716EP/R2
DDR4 VDDQ,
VTT, VREF
VDDQ,SINK/SOURCE
DDR TE RMINATION
REGULATOR
PS_DDR_EN
PS_DDRREG_PG_B
VTT
0.60V @ 3A
VREFCA_S
0.60V @ 3A
To CPLD
3V3
DRAM VTT
DRAM VREFCA_S
LS1028 VCC_GVDD
VCC_GVDD_S
DRAM VDD
SD_B
3V3
PVIN1:4
VLDOIN
1V2
VTT-0V6
MVREF-0V6
EVDD
LS1028 TA_BB_VDD
TA_BB_VDD
0.9V/1.0V @ .15A
MAX8902B
3.3V
BAT
3V_STBY
TA_B B_VDD
Figure 4. Power supplies - Part 2
Note that several power supplies have onboard low-pass filters, to prevent board switching noise from coupling into sensitive
analog supplies. The figure below shows the filters used.
2.2uF
2.2uF
2.2uF=NFM18PC225B1A3
2.2uF=GRM155R60J225KE95
LPF
LPF
47uF
3nF
4.7uF
0.33OHm
LPF
10uF 1uF
5.1OHm
0.22uF
Figure 5. Passive low pass filters
2.2.1 Primary power supply
The LS1028ARDB is powered up through an external 12 V DC power adapter. The specifications of the DC adapter are as follows:
LS1028ARDB Functional Description
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
16
COMPANY CONFIDENTIAL
NXP Semiconductors
Содержание QorIQ LS1028A
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