9–18
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
1
You can still use this method if the master and slave devices use the same
.sof.
Figure 9–5. Multi-Device AS Configuration where the Devices Receive the Same Data with Multiple SRAM Object Files
V
CCIO
(1)
V
CCIO
(1)
V
CCIO
(1)
V
CCIO
(2)
Slave Device of
the
Cyclone III Device Family
nSTATUS
CONF_DONE
nCONFIG
nCE
10 kΩ
10 kΩ
10 kΩ
10 kΩ
nCEO
N.C.
(3)
DATA[0]
DCLK
MSEL[3..0]
Serial Configuration
Device
Master Device of
the
Cyclone III Device
Family
nSTATUS
CONF_DONE
nCONFIG
nCE
GND
(4)
Slave Device of
the
Cyclone III Device Family
nSTATUS
CONF_DONE
nCONFIG
nCE
nCEO
nCEO
N.C.
(3)
DATA
DCLK
nCS
ASDI
25
Ω
(6)
50
Ω
(6), (8)
DATA[0]
DCLK
nCSO
(5)
ASDO
(5)
DATA[0]
DCLK
MSEL[3..0]
(4)
MSEL[3..0]
(4)
Slave Device of
the
Cyclone III Device Family
nSTATUS
CONF_DONE
nCONFIG
nCE
50
Ω
(8)
Buffers (7)
DATA[0]
DCLK
MSEL[3..0]
(4)
nCEO
N.C.
(3)
Notes to
(1) Connect the pull-up resistors to the V
CCIO
supply of the bank in which the pin resides.
(2) Connect the pull-up resistor to the V
CCIO
supply voltage of the I/O bank in which the
nCE
pin resides.
(3) 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.
(4) The MSEL pin settings vary for different configuration voltage standards and POR time. You must set the master device in AS mode and the slave
devices in PS mode. To connect
MSEL[3..0]
for the master device in AS mode and the slave devices in PS mode, refer to
Connect the MSEL pins directly to V
CCA
or GND.
(5) These are dual-purpose I/O pins. The
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) Connect the series resistor at the near end of the serial configuration device.
(7) 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
(8) The 50- series resistors are optional if the 3.3-V configuration voltage standard is applied. For optimal signal integrity, connect these 50- series
resistors if the 2.5- or 3.0-V configuration voltage standard is applied.
Cyclone III Device Handbook
Volume 1
August 2012 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
