Altera Cyclone IV - Page 211

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices 8–47
Configuration
May 2013 Altera Corporation Cyclone IV Device Handbook,
Volume 1
For device using V
CCIO
of 2.5, 3.0, and 3.3 V, refer to Figure 8–23. All I/O inputs must
maintain a maximum AC voltage of 4.1 V because JTAG pins do not have the internal
PCI clamping diodes to prevent voltage overshoot when using V
CCIO
of 2.5, 3.0, and
3.3 V. You must power up the V
CC
of the download cable with a 2.5-V supply from
V
CCA
. For device using V
CCIO
of 1.2, 1.5, and 1.8 V, refer to Figure 8–24. You can power
up the V
CC
of the download cable with the supply from V
CCIO
.
Figure 8–23. JTAG Configuration of a Single Device Using a Download Cable (2.5, 3.0, and 3.3-V
V
CCIO
Powering the JTAG Pins)
Notes to Figure 8–23:
(1) Connect these pull-up resistors to the V
CCIO
supply of the bank in which the pin resides.
(2) Connect the
nCONFIG and MSEL pins to support a non-JTAG configuration scheme. If you only use JTAG
configuration, connect the
nCONFIG pin to logic-high and the MSEL pins to GND. In addition, pull DCLK and DATA[0]
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
must match the device’s V
CCA
.
For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide. When using the USB-Blaster,
ByteBlaster II, ByteBlasterMV, and EthernetBlaster cables, this pin is a no connect.
(4) The
nCE pin must be connected to GND or driven low for successful JTAG configuration.
(5) 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.
(6) Power up the V
CC
of the EthernetBlaster, ByteBlaster II, USB-Blaster, or ByteBlasterMV 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) Resistor value can vary from 1 k to 10 k..
nCE (4)
MSEL[ ]
nCONFIG
CONF_DONE
V
CCA
V
CCA
(6)
GND
V
CCIO
(1)
GND
V
CCIO
(1)
(2)
V
CCA
10 kΩ
10 kΩ
(7)
nSTATUS
Pin 1
Download Cable 10-Pin Male
Header (Top View)
GND
TCK
TDO
TMS
TDI
GND
V
IO
(3)
Cyclone IV Device
nCEO
N.C. (5)
DCLK
DATA[0]
(2)
(2)
(2)
(7)
1 k
Ω