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| EP2C8T144I8N Datasheet, PDF (403/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1 | |||
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Configuring Cyclone II Devices
Quartus II programmer and a download cable. Figure 13â19 shows the PS
configuration for Cyclone II devices using a USB-Blaster, MasterBlaster,
ByteBlaster II or ByteBlasterMV cable.
Figure 13â19. PS Configuration Using a USB-Blaster, MasterBlaster, ByteBlaster II or ByteBlasterMV Cable
VCC (1)
(2) 10 kΩ
VCC (1)
10 kΩ
(2)
VCC (1)
10 kΩ
VCC
GND
Cyclone II Device
CONF_DONE
nSTATUS
MSEL0
MSEL1
nCE
nCEO
DCLK
DATA0
nCONFIG
VCC (1) VCC (1)
10 kΩ 10 kΩ
N.C. (4)
USB-Blaster, ByteBlaster II,
MasterBlaster,
or ByteBlasterMV
10-Pin Male Header
Pin 1
VCC
GND
VIO (3)
Shield
GND
Notes to Figure 13â19:
(1) The pull-up resistor should be connected to the same supply voltage as the USB-Blaster, MasterBlaster (VIO pin),
ByteBlaster II, or ByteBlasterMV cable.
(2) The pull-up resistors on DATA0 and DCLK are only needed if the download cable is the only configuration scheme
used on your board. This is to ensure that DATA0 and DCLK are not left floating after configuration. For example, if
you are also using a configuration device, the pull-up resistors on DATA0 and DCLK are not needed.
(3) Pin 6 of the header is a VIO reference voltage for the MasterBlaster output driver. VIO should match the deviceâs
VCCIO. Refer to the MasterBlaster Serial/USB Communications Cable Data Sheet for this value. In the ByteBlasterMV,
this pin is a no connect. In the USB-Blaster and ByteBlaster II, this pin is connected to nCE when it is used for AS
programming, otherwise it is a no connect.
(4) The nCEO pin can be left unconnected or used as a user I/O pin when it does not feed other deviceâs nCE pin.
You can use a download cable to configure multiple Cyclone II devices by
connecting each deviceâs nCEO pin to the subsequent deviceâs nCE pin.
Connect the first Cyclone II deviceâs nCE pin to GND and connect its
nCEO pin to the nCE pin of the next device in the chain. Use an external
10-kΩ pull-up resistor to pull the nCEO pin high to VCCIO when it feeds
next deviceâs nCE pin. Connect all other configuration pins (nCONFIG,
nSTATUS, DCLK, DATA0, and CONF_DONE) on every device in the chain
together. Because all CONF_DONE pins are connected, all devices in the
chain initialize and enter user mode at the same time.
Altera Corporation
February 2007
13â49
Cyclone II Device Handbook, Volume 1
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