7–72
Altera Corporation
Stratix II Device Handbook, Volume 2
January 2008
Passive Serial Configuration
Figure 7–29. PS Configuration with a Download Cable and Configuration Device Circuit
(1)
The pull-up resistor should be connected to the same supply voltage as the configuration device.
(2)
Pin 6 of the header is a VIO reference voltage for the MasterBlaster output driver. VIO should match the device’s
cable, this pin is a no connect. In the USB Blaster and ByteBlaster II cables, this pin is connected to nCE when it is
used for active serial programming, otherwise it is a no connect.
(3)
You should not attempt configuration with a download cable while a configuration device is connected to a Stratix II
or Stratix II GX device. Instead, you should either remove the configuration device from its socket when using the
download cable or place a switch on the five common signals between the download cable and the configuration
device.
(4)
The nINIT_CONF pin (available on enhanced configuration devices and EPC2 devices only) has an internal pull-up
resistor that is always active. This means an external pull-up resistor should not be used on the
nINIT_CONF
-nCONFIG line. The nINIT_CONF pin does not need to be connected if its functionality is not used.
(5)
The enhanced configuration devices’ and EPC2 devices’ OE and nCS pins have internal programmable pull-up
resistors. If internal pull-up resistors are used, external pull-up resistors should not be used on these pins. The
internal pull-up resistors are used by default in the Quartus II software. To turn off the internal pull-up resistors,
check the Disable nCS and OE pull-up resistors on configuration device option when generating programming
files.
f
For more information on how to use the USB Blaster, MasterBlaster,
ByteBlaster II or ByteBlasterMV cables, refer to the following data sheets:
■
Stratix II or Stratix II GX
Device
nCE
nCONFIG
CONF_DONE
DCLK
nCEO
GND
Download Cable
10-Pin Male Header
(PS Mode)
VCC
VCC (1)
nSTATUS
DATA0
GND
10 k
Ω
10 k
Ω
10 k
Ω
Pin 1
Configuration
Device
(3)
GND
VIO (2)
N.C.
(1)
(4)
(5)
DCLK
DATA
OE
nCS
nINIT_CONF (4)
(5)
MSEL1
MSEL0
GND
MSEL3
MSEL2
VCC