Power On/Off Switch; Run/Prog Switch - Altera Cyclone II Reference Manual

Altera Corporation
October 2006

Power ON/OFF Switch

The Cyclone II FPGA Starter board receives its power from either the USB
port directly or the included 7.5V power adapter. The Power On/Off
switch gates the power from both of these sources to the rest of the board.

RUN/PROG Switch

The RUN/PROG switch directs the JTAG signals from the USB-Blaster
circuit to the FPGA directly when in the RUN position
the EPCS4 Serial EEPROM configuration device when in the PROG
position (Figure 2–9).
Figure 2–8. RUN/PROG Switch in RUN Position
USB Blaster Circuit
USB RUN/PROG
MAX
3128
RUN"
Figure 2–9. RUN/PROG Switch in PROG Position
USB Blaster Circuit
USB RUN/PROG
MAX
3128
PROG"
With the RUN/PROG switch in the RUN position, the FPGA configures
from the EPCS4 device on power up.
Reference Manual
Development Board Components
Auto Power on Config
EPCS Serial
Configuration
Device
Auto Power on Config
EPCS Serial
Configuration
Device
Cyclone II FPGA Starter Development Board
(Figure 2–8) or to
JTAG Config Port
FPGA
JTAG Config Port
FPGA
2–15