Altera Arria V GX Starter Board - Manual (Page 58)

2–50 Chapter 2: Board Components
Power Supply
Arria V GX Starter Board November 2013 Altera Corporation
Reference Manual
Power Measurement
There are 8 power supply rails that have on-board current sense capabilities using
24-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 MAX V CPLD 5M2210 System Controller.
Figure 2–13 shows the block diagram for the power measurement circuitry.
Table 2–50 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. If no subnet is named, the power is the total output power for that
voltage.
Figure 2–13. Power Measurement Circuit
SCK
SPI Bus
DSI
DSO
CSn
8 Ch.
Power Supply Load #0-7
R
SENSE
5M2210
Arria V
FPGA
To User PC
JTAG Chain
Feedback
14-pin
2x16
Character
LCD
E
RW
RS
D(0:7)
Supply
#0-7
EPM570
USB
PHY
Embedded
USB-Blaster II
Table 2–50. Power Measurement Rails (Part 1 of 2)
Channel Schematic Signal Name Voltage (V) Device Pin Description
0 A5_VCCINT 1.1 VCC FPGA core and periphery power
1 A5_VCCL_VCCR_VCCT_GXB
1.1 VCCL_GXB XCVR analog clock network
1.1 VCCR_GXB XCVR analog receive
1.1 VCCT_GXB XCVR analog transmit
2 A5_VCCIO_1.5V 1.5
VCCIO_8A,
VCCIO_8B,
VCCIO_8C
VCCIO bank 8 (DDR3)