EP4CE40 datasheet(172/488 Pages) ALTERA

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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

Table 8–5.

1 Hardwire the MSEL pins to VCCA 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)

Fast

3.3

Fast

3.0, 2.5

Standard

3.3

Standard

3.0, 2.5

Fast

3.3, 3.0, 2.5

Fast

1.8, 1.5

Standard

3.3, 3.0, 2.5

JTAG-based configuration (2)

(3)

—

Notes to Table 8–3:

(1) Configuration voltage standard applied to the VCCIO 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 VCCA 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)

Fast

3.3

Fast

3.0, 2.5

Standard

3.3

Standard

3.0, 2.5

Fast

3.3, 3.0, 2.5

Fast

1.8, 1.5

Standard

3.3, 3.0, 2.5

Standard

1.8, 1.5

FPP

Fast

3.3, 3.0, 2.5

Fast

1.8, 1.5

Standard

3.3, 3.0, 2.5

Standard

1.8, 1.5

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