9–22
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
shows the download cable connections to the serial configuration device.
Figure 9–7. In-System Programming of Serial Configuration Devices
V
CCIO
(1)
V
CCIO
(1)
V
CCIO
(1)
10 kΩ
10 kΩ
10 kΩ
Cyclone III Device Family
nSTATUS
CONF_DONE
nCONFIG
nCE
10 kΩ
3.3
V
3.3
V
GND
(6)
DATA
DCLK
nCS
ASDI
DATA[0]
(7)
DCLK
(7)
nCSO
(5)
ASDO
(5)
3.3
V
3.3
V
nCEO
N.C.
(2)
Serial
Configuration Device
MSEL[3..0]
(4)
Pin 1
3.3
V
(3)
GND
10 pf
10 pf
10 pf
GND
ByteBlaster II or USB Blaster
10-Pin Male Header
GND
GND
10 pf
(6)
GND
GND
Notes to
(1) Connect these pull-up resistors to the V
CCIO
supply of the bank in which the pin resides.
(2) 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.
(3) Power up the V
CC
of the ByteBlaster II or USB-Blaster download cable with the 3.3-V supply.
(4) The MSEL pin settings vary for different configuration voltage standards and POR time. To connect
MSEL[3..0],
refer to
Connect the MSEL pins directly to V
CCA
or ground.
(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) The diodes and capacitors must be placed as close as possible to the Cyclone III device family. Ensure that the diodes and capacitors maintain a
maximum AC voltage of 4.1 V. The external diodes and capacitors are required to prevent damage to the Cyclone III device family AS configuration
input pins due to possible overshoot when programming the serial configuration device using a download cable. 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
(7) When cascading Cyclone III device family in a multi-device AS configuration, connect the repeater buffers between the master and slave devices
for
DATA[0]
and
DCLK.
All I/O inputs must maintain a maximum AC voltage of 4.1 V. The output resistance of the repeater buffers must fit the
maximum overshoot equation outlined in
You can use the Quartus II software with the APU and the appropriate configuration
device programming adapter to program serial configuration devices. All serial
configuration devices are offered in an 8- or 16-pin small outline integrated circuit
(SOIC) package.
Cyclone III Device Handbook
Volume 1
August 2012 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
