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Table 2-1. FRDM-LS1012A power supply devices
Sourc
e
volta
ge
rail
Output
voltage rail
Reference
designator
Vendor
Device
Description
VCC_VREF
VCC_POVDD
• DDR3L memory
• 1.8 V voltage for QSPI memory, SAI2 port,
general I/O
2.2.3 Power-ON
The FRDM-LS1012A is powered using USB power provided through a USB 2.0 Type
Micro-AB port.
The USB power provides 5 V DC voltage. The 5 V voltage powers primary power supply
regulator U7. U7 provides power supply to secondary regulator U8 and the onboard
SGMII PHYs. The secondary regulator, U8, generates power supply for peripherals, such
as QSPI flash memory and LS1012A power supplies.
Table 2-2
describes the Power-ON sequence as implemented on the FRDM-LS1012A.
Table 2-2. Power-ON process
Step
Indication
Specifics
Description
1
5V
• Power supply provided by USB2.0 Micro-AB port
• Acts as source PS for secondary regulator MC34713
2
3V3
• 3.3 V power supply for onboard SGMII PHYs and LS1012A
supplies: EVDD and USB_HVDD
• Acts as source PS for secondary regulators VR5100
3
1V8, 1V35
Power supplies provided by secondary regulator VR5100
• Provides power to peripherals and LS1012A IO and PLL
supplies (AVDD_PLAT, AVDD_CGA1, TH_VDD,
AVDD_SD1_PLL1, AVDD_SD1_PLL2, OVDD, XOSC_OVDD,
USB_SVDD, USB_SDVDD, G1VDD, VREF, SVDD, and XVDD)
4
0V9
• LS1012A core supplies: VDD
5
Red LED (D3)
• Reset LED is deasserted.
2.2.4 Voltage regulation
Power supplies
QorIQ FRDM-LS1012A Board Reference Manual, Rev. 3, 12/2016
14
NXP Semiconductors
Содержание QorIQ FRDM-LS1012A
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