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
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
V
CCIO
(2)
V
CCIO
(2)
10 kΩ
GND
N.C.
(4)
10 kΩ
Cyclone III Device Family
nCE
(3)
TCK
TDO
nCEO
nSTATUS
CONF_DONE
nCONFIG
MSEL[3..0]
DATA[0]
DCLK
TMS
TDI
(1)
V
CCA
(1)
Download Cable 10-Pin Male
Header (Top View)
(5)
(5)
(5)
(5)
Pin 1
V
CCA
(6)
GND
V
IO
(7)
1 kΩ
GND
GND
Notes to
(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
(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
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
ALTERA [ ALTERA CORPORATION ]
