8–16
Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
May 2013
Altera Corporation
Figure 8–4. Multi-Device AS Configuration in Which Devices Receive the Same Data with Multiple .sof
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 the
MSEL
pins for the master device in AS mode and the slave devices in PS mode, refer to
,
, and
. Connect the
MSEL
pins directly to V
CCA
or GND.
(5) Connect the series resistor at the near end of the serial configuration device.
(6) 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
“Configuration and JTAG Pin I/O
.
(7) 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.
(8) These pins are dual-purpose I/O pins. The
nCSO
pin functions as
FLASH_nCE
pin in AP mode. The
ASDO
pin functions as
DATA[1]
pin in AP and
FPP modes.
(9) Only Cyclone IV GX devices have an option to select
CLKUSR
(40 MHz maximum) as the external clock source for
DCLK
.
(10) For multi-devices AS configuration using Cyclone IV E with 1,0 V core voltage, the maximum board trace-length from the serial configuration
device to the junction-split on both
DCLK
and
Data0
line is 3.5 inches.
nSTATUS
nCO
N
FIG
CO
N
F_DO
N
E
nCE
DATA[0]
DCLK
nCEO
N
.C.
(3)
(4)
Cyclone IV Slave Device
nSTATUS
nCO
N
FIG
CO
N
F_DO
N
E
nCE
DATA[0]
DCLK
nCEO
N
.C.
(3)
(4)
V
CCIO
(1)
V
CCIO
(1)
nSTATUS
nCO
N
FIG
CO
N
F_DO
N
E
nCE
DATA[0]
DCLK
nCEO
MSEL[ ]
N
.C.
(3)
(4)
nSTATUS
nCO
N
FIG
CO
N
F_DO
N
E
nCE
DATA[0]
DCLK
nCSO
(8)
ASDO
(8)
nCEO
(4)
MSEL[ ]
MSEL[ ]
MSEL[ ]
DATA
DCLK
nCS
ASDI
Se
r
ial Configu
r
a
t
ion
Device
G
N
D
V
CCIO
(1)
V
CCIO
(2)
10 k
Ω
10 k
Ω
10 k
Ω
10 k
Ω
(5)
25
Ω
(5),
50
Ω
(7)
B
u
ffe
rs
(6)
(7)
50
Ω
Cyclone IV Slave Device
Cyclone IV Slave Device
Cyclone IV Mas
t
e
r
Device
CLKUSR
(9)
(10)
(10)
Содержание Cyclone IV
Страница 10: ...x Chapter Revision Dates Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
Страница 14: ...I 2 Section I Device Core Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
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Страница 164: ...III 2 Section III System Integration Cyclone IV Device Handbook March 2016 Altera Corporation Volume 1...
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Страница 280: ...I 2 Section I Transceivers Cyclone IV Device Handbook February 2015 Altera Corporation Volume 2...
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