8–8 Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
Cyclone IV Device Handbook, May 2013 Altera Corporation
Volume 1
Configuration Scheme
A configuration scheme with different configuration voltage standards is selected by
driving the
MSEL
pins either high or low, as shown in Table 8–3, Table 8–4, and
Tab le 8 –5 .
1 Hardwire the
MSEL
pins to V
CCA
or GND without pull-up or pull-down resistors to
avoid problems detecting an incorrect configuration scheme. Do not drive the
MSEL
pins with a microprocessor or another device.
Table 8–3. Configuration Schemes for Cyclone IV GX Devices (EP4CGX15, EP4CGX22, and EP4CGX30 [except for F484
Package])
Configuration Scheme MSEL2 MSEL1 MSEL0 POR Delay Configuration Voltage Standard (V)
(1)
AS
1 0 1 Fast 3.3
0 1 1 Fast 3.0, 2.5
0 0 1 Standard 3.3
0 1 0 Standard 3.0, 2.5
PS
1 0 0 Fast 3.3, 3.0, 2.5
1 1 0 Fast 1.8, 1.5
0 0 0 Standard 3.3, 3.0, 2.5
JTAG-based configuration
(2) (3) (3) (3)
——
Notes to Table 8–3:
(1) Configuration voltage standard applied to the V
CCIO
supply of the bank in which the configuration pins reside.
(2) JTAG-based configuration takes precedence over other configuration schemes, which means the
MSEL
pin settings are ignored.
(3) Do not leave the
MSEL
pins floating. Connect them to V
CCA
or GND. These pins support the non-JTAG configuration scheme used in production.
Altera recommends connecting the
MSEL
pins to GND if your device is only using JTAG configuration.
Table 8–4. Configuration Schemes for Cyclone IV GX Devices (EP4CGX30 [only for F484 package], EP4CGX50,
EP4CGX75, EP4CGX110, and EP4CGX150) (Part 1 of 2)
Configuration Scheme MSEL3 MSEL2 MSEL1 MSEL0 POR Delay Configuration Voltage Standard (V)
(1)
AS
1101 Fast 3.3
1011 Fast 3.0, 2.5
1001Standard 3.3
1 0 1 0 Standard 3.0, 2.5
PS
1 1 0 0 Fast 3.3, 3.0, 2.5
1110 Fast 1.8, 1.5
1 0 0 0 Standard 3.3, 3.0, 2.5
0 0 0 0 Standard 1.8, 1.5
FPP
0 0 1 1 Fast 3.3, 3.0, 2.5
0100 Fast 1.8, 1.5
0 0 0 1 Standard 3.3, 3.0, 2.5
0 0 1 0 Standard 1.8, 1.5
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