EP2C20F256C8N Datasheet, PDF (409/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1

Configuring Cyclone II Devices
Single Device JTAG Configuration
During JTAG configuration, you can use the USB-Blaster, MasterBlaster,
ByteBlaster II, or ByteBlasterMV download cable to download data to the
device. Configuring Cyclone II devices through a cable is similar to
programming devices in system. Figure 13–22 shows JTAG configuration
of a single Cyclone II device using a download cable.
Figure 13–22. JTAG Configuration of a Single Device Using a Download Cable
VCC (1)
VCC (1) 10 kΩ
10 kΩ
GND
N.C. (5)
(2)
(2)
(2)
(2)
(2)
VCC (1)
VCC (1)
1 kΩ
Cyclone II Device ^{1 kΩ}
nCE (4)
TCK
TDO
nCEO
nSTATUS
CONF_DONE
nCONFIG
MSEL0
MSEL1
DATA0
DCLK
TMS
TDI
USB-Blaster, ByteBlaster II,
MasterBlaster, or ByteBlasterMV
10-Pin Male Header
(Top View)
Pin 1
VCC (1)
GND
VIO (3)
1 kΩ
GND
GND
Notes to Figure 13–22:
(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) Connect the nCONFIG and MSEL[1..0] pins to support a non-JTAG configuration scheme. If only JTAG
configuration is used, connect the nCONFIG pin to V_CC, and the MSEL[1..0] pins to ground. In addition, pull DCLK
and DATA0 to either high or low, whichever is convenient on your board.
(3) Pin 6 of the header is a V_IO reference voltage for the MasterBlaster output driver. V_IO should match the device’s
V_CCIO. 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) nCE must be connected to GND or driven low for successful JTAG configuration.
(5) The nCEO pin can be left unconnected or used as a user I/O pin when it does not feed other device’s nCE pin.
To configure a single device in a JTAG chain, the programming software
places all other devices in BYPASS mode. In BYPASS mode, Cyclone II
devices pass programming data from the TDI pin to the TDO pin through
a single bypass register without being affected internally. This scheme
Altera Corporation
February 2007
13–55
Cyclone II Device Handbook, Volume 1