EP4CE30F29C7N Datasheet, PDF (211/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
8–47
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)
V_CCA
V_CCIO (1)
(7)
V_CCIO (1)
10 kΩ
10 kΩ
GND
N.C. (5)
(2)
(2)
(2)
(2)
Cyclone IV Device
nCE (4)
TCK
TDO
nCEO
nSTATUS
CONF_DONE
nCONFIG
MSEL[ ]
DATA[0]
DCLK
TMS
TDI
V_CCA
(7)
Download Cable 10-Pin Male
Header (Top View)
Pin 1
V_CCA (6)
GND
V_IO (3)
1 kΩ
GND
GND
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 kΩ to 10 kΩ..
May 2013 Altera Corporation
Cyclone IV Device Handbook,
Volume 1