Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
9–57
Configuration Features
Figure 9–29. Combining JTAG and AS Configuration Schemes
V
V
V
CCIO(1) CCIO(1) CCIO(1)
10 kΩ 10 kΩ
10 kΩ
Cyclone III Device Family
V
CCA
nSTATUS
N.C.
nCEO
CONF_DONE
nCONFIG
(8)
nCE
V
CCA
3.3 V
3.3 V
3.3 V
3.3 V
(4)
10kΩ
Serial
MSEL [3..0]
Configuration
Device
(8)
GND
(7)
Download Cable
(JTAG Mode)
10-Pin Male Header
(top view)
DATA[0]
DCLK
TCK
TDO
TMS
TDI
DATA
DCLK
nCS
nCSO (5)
ASDO (5)
Pin 1
ASDI
VCCA (6)
Pin 1
V
(3)
IO
3.3 V (2)
1 kΩ
10 pf
GND
10 pf
10 pf
Download Cable
(AS Mode)
10-Pin Male Header
GND
10 pf
GND
GND
(7)
GND
Notes to Figure 9–29:
(1) Connect these pull-up resistors to the VCCIO supply of the bank in which the pin resides.
(2) Power up the VCC of the ByteBlaster II, USB-Blaster, or Ethernet Blaster cable with the 3.3-V supply.
(3) Pin 6 of the header is a VIO reference voltage for the MasterBlaster output driver. VIO must match the VCCA of the
device. For this value, refer to the MasterBlaster Serial/USB Communications Cable User Guide. In ByteBlasterMV,
this pin is a no connect. In USB-Blaster and ByteBlaster II, this pin is connected to nCEwhen 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 Table 9–7 on page 9–11. Connect the MSEL pins directly to VCCA or GND.
(5) These are dual-purpose I/O pins. This nCSOpin functions as the FLASH_NCEpin in AP mode. The ASDOpin functions
as the DATA[1]pin in other AP and FPP modes.
(6) Power up VCC 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 VCC 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) 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
AN 523: Cyclone III Configuration Interface Guidelines with EPCS Devices.
(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 ]
