Altera Cyclone V SoC Development Board - Manual (Page 59)

Chapter 2: Board Components 2–51
Power Supply
November 2013 Altera Corporation Cyclone V SoC Development Board
Reference Manual
Power Measurement
There are seven power supply rails that have on-board current sense capabilities
using 16-bit differential ADC devices. Precision sense resistors split the ADC devices
and rails from the primary supply plane for the ADC to measure current. A SPI bus
connects these ADC devices to the FPGA, HPS, and MAX V CPLD 5M2210 System
Controller.
Figure 2–11 shows the block diagram for the power measurement circuitry.
Table 2–40 lists the targeted rails. The schematic signal name column specifies the
name of the rail being measured while the device pin column specifies the devices
attached to the rail.
Figure 2–11. Power Measurement Circuit
SCK
SPI Bus
DSI
DSO
CSn
8 Ch.
Power Supply Load #0-6
R
SENSE
MAX V CPLD
5M2210
System
Controller
Cyclone V
SoC
To User PC
JTAG Chain
Feedback
14-pin
2x16
Character
LCD
E
RW
RS
D(0:7)
Supply
#0-6
EPM570
USB
PHY
Embedded
USB-Blaster II
Table 2–40. Power Measurement Rails
Channel Schematic Signal Name Voltage (V) Device Pin Description
0 1.1V_HPS 1.1 VCC_HPS HPS core power
1 1.5V_HPS 1.5 VCCIO6A_HPS I/O and DDR3 devices
2 3.3V_HPS 3.3
VCCIO7A_HPS
I/O and HPS peripheral devices
VCCIO7B_HPS
VCCIO7C_HPS
VCCIO7D_HPS
3 2.5V_HPS 2.5 VCCPD6A6B_HPS I/O, HPS internal and peripheral devices
4 1.1V_VCC 1.1 VCC FPGA core power, transceiver, and clock
5 1.5V_FPGA 1.5
VCCIO3B
I/O and DDR3 devices
VCCIO4A
6 2.5V_FPGA 2.5
VCCIO5A
I/O, FPGA internal and peripheral devices VCCIO5B
VCCIO8A