EP2S180F1020C4 Datasheet, PDF (624/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

Passive Serial Configuration
Figure 7–29. PS Configuration with a Download Cable and Configuration Device Circuit
VCC (1)
10 kΩ (4)
V_CC (1)
10 kΩ (5) ^{VCC (1)}
Stratix II or Stratix II GX
Device
V_CC
MSEL3 CONF_DONE
(5) 10 kΩ
MSEL2
MSEL1
MSEL0
nSTATUS
DCLK
GND
nCE
GND
DATA0
nCONFIG
nCEO N.C.
(3) (3)
(3)
(3)
Download Cable
10-Pin Male Header
(PS Mode)
Pin 1
VCC
GND
VIO (2)
(3)
GND
Configuration
Device
DCLK
DATA
OE (5)
nCS (5)
nINIT_CONF (4)
Notes to Figure 7–29:
(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 V_IO reference voltage for the MasterBlaster output driver. V_IO should match the device’s
V_CCIO. Refer to the MasterBlaster Serial/USB Communications Cable User Guide for this value. In the ByteBlasterMV
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:
■ USB Blaster Download Cable User Guide
■ MasterBlaster Serial/USB Communications Cable User Guide
■ ByteBlaster II Download Cable User Guide
■ ByteBlasterMV Download Cable User Guide
7–72
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008