EP3C5E144C8N Datasheet, PDF (170/348 Pages) Altera Corporation – Ability to disable external JTAG port

9–12
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
Table 9–7. Cyclone III Device Family Configuration Schemes ⁽¹⁾ (Part 2 of 2)
Configuration Scheme
MSEL
Configuration Voltage Standard (V)
3
2
1
0
(2), (3)
Active Parallel ×16 Fast (AP Fast POR, for
Cyclone III devices only)
0
1
1
0
1.8
Passive Serial Standard (PS Standard POR)
0
0
0
0
3.3/3.0/2.5
Passive Serial Fast (PS Fast POR)
1
1
0
0
3.3/3.0/2.5
Fast Passive Parallel Fast (FPP Fast POR) ⁽⁴⁾ 1
1
1
0
3.3/3.0/2.5
Fast Passive Parallel Fast (FPP Fast POR)
(for Cyclone III devices only) ⁽⁴⁾
1
1
1
1
1.8/1.5
Fast Passive Parallel Fast (FPP Fast POR)
(for Cyclone III LS devices only)
0
0
0
1
1.8/1.5
Fast Passive Parallel Fast (FPP Fast POR)
with Encryption (for Cyclone III LS
devices only)
0
1
0
1
3.3/3.0/2.5
Fast Passive Parallel Fast (FPP Fast POR)
with Encryption (for Cyclone III LS
devices only)
0
1
1
0
1.8/1.5
JTAG-based configuration ⁽⁵⁾
(6)
(6)
(6)
(6)
—
Notes to Table 9–7:
(1) Altera recommends connecting the MSEL pins to V_CCA or GND depending on the MSEL pin settings.
(2) The configuration voltage standard is applied to the V_CCIO supply of the bank in which the configuration pins reside.
(3) You must follow specific requirements when interfacing Cyclone III device family with 2.5-, 3.0-, and 3.3-V configuration voltage standards. For
more information about these requirements, refer to “Configuration and JTAG Pin I/O Requirements” on page 9–7.
(4) FPP configuration is not supported in the Cyclone III E144 device package of Cyclone III devices.
(5) The JTAG-based configuration takes precedence over other configuration schemes, which means the MSEL pin settings are ignored.
(6) 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 the JTAG configuration.
AS Configuration (Serial Configuration Devices)
In the AS configuration scheme, Cyclone III device family is configured using a serial
configuration device. These configuration devices are low-cost devices with
non-volatile memories that feature a simple four-pin interface and a small form factor.
These features make serial configuration devices the ideal low-cost configuration
solution.
f For more information about serial configuration devices, refer to the Serial
Configuration Devices (EPCS1, EPCS4, EPCS16, EPCS64, and EPCS128) Data Sheet
chapter in volume 2 of the Configuration Handbook.
In Cyclone III device family, the active master clock frequency runs at a maximum of
40 MHz, and typically at 30 MHz. Cyclone III device family only work with serial
configuration devices that support up to 40 MHz.
Serial configuration devices provide a serial interface to access configuration data.
During device configuration, Cyclone III device family reads configuration data using
the serial interface, decompress data if necessary, and configure their SRAM cells. This
scheme is referred to as the AS configuration scheme because the device controls the
configuration interface.
Cyclone III Device Handbook
Volume 1
December 2011 Altera Corporation