Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
9–57
Figure 9–29. Combining JTAG and AS Configuration Schemes
V
CCIO
(1)
V
CCIO
(1)
V
CCIO
(1)
10 kΩ
10 kΩ
10 kΩ
Cyclone III Device Family
V
CCA
nSTATUS
CONF_DONE nCEO
N.C.
(8)
nCONFIG
nCE
V
MSEL [3..0]
(4)
Serial
Configuration
Device
DATA
DCLK
nCS
ASDI
10kΩ
GND
3.3
V
3.3
V
3.3
V
3.3
V
CCA
(8)
DATA[0]
DCLK
nCSO
(5)
ASDO
(5)
TCK
TDO
TMS
TDI
Pin 1
V
CCA
(6)
(7)
Download Cable
(JTAG Mode)
10-Pin Male Header
(top view)
Pin 1
3.3
V
(2)
V
IO
(3)
1 kΩ
10 pf
Download Cable
(AS Mode)
10-Pin Male Header
(7)
10 pf
10 pf
GND
GND
10 pf
GND
GND
GND
Notes to
(1) Connect these pull-up resistors to the V
CCIO
supply of the bank in which the pin resides.
(2) Power up the V
CC
of the ByteBlaster II, USB-Blaster, or Ethernet Blaster cable with the 3.3-V supply.
(3) Pin 6 of the header is a V
IO
reference voltage for the MasterBlaster output driver. V
IO
must match the V
CCA
In ByteBlasterMV,
this pin is a no connect. In USB-Blaster and ByteBlaster II, this pin is connected to
nCE
when it is used for AS
programming, otherwise it is a no connect.
(4) The MSEL pin settings vary for different configuration voltage standards and POR time. To connect
MSEL[3..0]for
AS configuration schemes, refer to
Connect the MSEL pins directly to V
CCA
or GND.
(5) These are dual-purpose I/O pins. This
nCSO
pin functions as the
FLASH_NCE
pin in AP mode. The
ASDO
pin functions
as the
DATA[1]
pin in other AP and FPP modes.
(6) Power up 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
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
(7) You must place the diodes and capacitors as close as possible to the Cyclone III device family. For effective voltage
clamping, Altera recommends using the Schottky diode, which has a relatively lower forward diode voltage (VF) than
the switching and Zener diodes. For more information about the interface guidelines using Schottky diodes, refer to
(8) The resistor value can vary from 1 k to 10 k. Perform signal integrity analysis to select the resistor value for your
setup.
August 2012
Altera Corporation
Cyclone III Device Handbook
Volume 1
ALTERA [ ALTERA CORPORATION ]
