EP3C120F484C7 Datasheet, PDF (208/274 Pages) Altera Corporation – Cyclone III Device Handbook

9–50
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
For device V_CCIO of 1.2, 1.5, and 1.8 V, refer to Figure 9–25. You can power up the V_CC
of the download cabled with the supply from V_CCIO.
Figure 9–24. JTAG Configuration of a Single Device Using a Download Cable (2.5, 3.0, and 3.3-V
V_CCIO Powering the JTAG Pins)
V_CCA
(1)
V_CCIO (2)
V_CCIO (2)
10 kΩ
10 kΩ
Cyclone III Device Family
GND
nCE (3)
TCK
TDO
N.C. (4) nCEO
nSTATUS
TMS
TDI
CONF_DONE
(5)
nCONFIG
(5)
MSEL[3..0]
(5)
DATA[0]
(5)
DCLK
V_CCA
(1)
Download Cable 10-Pin Male
Header (Top View)
Pin 1
V_CCA (6)
GND
V_IO (7)
1 kΩ
GND
GND
Notes to Figure 9–24:
(1) The resistor value can vary from 1 k to 10 k. Perform signal integrity analysis to select the resistor value for your
setup.
(2) Connect these pull-up resistors to the V_CCIO supply of the bank in which the pin resides.
(3) The nCE pin must be connected to GND or driven low for successful JTAG configuration.
(4) The nCEO pin is left unconnected or used as a user I/O pin when it does not feed the nCE pin of another device.
(5) Connect the nCONFIG and MSEL[3..0] pins to support a non-JTAG configuration scheme. If you only use a JTAG
configuration, connect the nCONFIG pin to logic high and the MSEL[3..0] pins to ground. In addition, pull DCLK and
DATA[0] either high or low, whichever is convenient on your board.
(6) Power up the V_CC of the ByteBlaster II, USB-Blaster, ByteBlasterMV, or Ethernet Blaster cable with a 2.5- V supply
from V_CCA. Third-party programmers must switch to 2.5 V. Pin 4 of the header is a V_CC power supply for the
MasterBlaster cable. The MasterBlaster cable can receive power from either 5.0- or 3.3-V circuit boards, DC power
supply, or 5.0 V from the USB cable. For this value, refer to the MasterBlaster Serial/USB Communications Cable User
Guide.
(7) Pin 6 of the header is a V_IO reference voltage for the MasterBlaster output driver. V_IO must match the device's V_CCA.
For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide. In USB-Blaster,
ByteBlaster II, ByteBlasterMV, and Ethernet Blaster, this pin is a no connect.
Cyclone III Device Handbook
Volume 1
August 2012 Altera Corporation