ST EVALSP1310CPU, Руководство пользователя, Страница: 11 / 36

UM1585 Block descriptions
Doc ID 023872 Rev 1 11/36
4 Block descriptions
4.1 General power supply
The power supply block generates all the required voltages from a 5 V external AC/DC. The
generated voltages are:
●
5 V obtained from an over voltage protection device with thermal shutdown
● 1.2 V, generated from 5 V with a step-down switching regulator
●
1.5 V, 2.5 V, and 3.3 V generated from 5 V with a multi-output switching regulator
● 12 V generated from 5 V with a set-up converter
●
1.8 V generated from 3.3 V with a low drop voltage regulator
Table 1. Common power rails
Name Use
Jumper
for current
measurement
+5V
J13: Alternate power input connector
J11: Expansion connector
VDD1V2
SPEAr core (SPEAr_VDD1V2)
SPEAr DDR3 interface (SPEAr_DDR3_1V2)
JP31
JP30
VDD1V5
DDR3 chips
SPEAr DDR I/O (SPEAr_DDR3_1V5)
SPEAr RTC (RTC_VDD1V5)
-
JP32
JP39
VDD1V8
GigaPhy chip
SPEAr 1.8 V NAND8 Flash (JP3: Close 2&3 for 1.8 V)
NAND Flash chip (Close 2&3 of JP2 for 1.8V)
NAND expansion connector (Close2&3 of JP3)
-
JP3(2-3)
VDD2V5
SPEAr_OTP antifuses (JP1: Close 1&2 to supply)
SPEAr GMII interface(JP16: Close 2&3 for 2.5V)
SPEAr PCIe (JP24 close and JP5: Close 2&3 for ext power)
SPEAr A2D_PLLs_VDD2V5
SPEAr USB_VDD2V5
A2D connector
Ethernet RJ45 (J2)
Giga PHY (JP42 close 2&3)
JP33
JP1(1-2)
JP16(2-3)
VDD3V3
SPEAr (SPEAr_VDD3V3)
PCIe Clock Source
JTAG MIPHY connector
Giga PHY (JP42 close 1&2)
Serial NOR Flash
NAND Flash chip (Close 1&2 of JP2 for 3.3V)
NAND expansion connector (Close1&2 of JP3)
CPU JTAG & trace connectors
JP34