EP3C5E144C8N Datasheet, PDF (182/348 Pages) Altera Corporation – Ability to disable external JTAG port

9–24
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
AP Configuration Supported Flash Memory
The AP configuration controller in Cyclone III devices is designed to interface with
the Numonyx StrataFlash^® Embedded Memory P30 flash family and the Numonyx
StrataFlash Embedded Memory P33 flash family, which are two industry standard
flash families. Unlike serial configuration devices, both of the flash families supported
in the AP configuration scheme are designed to interface with microprocessors. By
configuring from an industry standard microprocessor flash which allows access to
the flash after entering user mode, the AP configuration scheme allows you to
combine configuration data and user data (microprocessor boot code) on the same
flash memory.
The Numonyx P30 and P33 flash families support a continuous synchronous burst
read mode at 40 MHz DCLK frequency for reading data from the flash. Additionally,
the Numonyx P30 and P33 flash families have identical pin-out and adopt similar
protocols for data access.
1 Cyclone III devices use a 40-MHz oscillator for the AP configuration scheme.
Table 9–11 lists the supported families of the commodity parallel flash for the AP
configuration scheme.
Table 9–11. Supported Commodity Flash for the AP Configuration Scheme for Cyclone III
Devices ⁽¹⁾
Flash Memory Density
Numonyx P30 Flash Family ⁽²⁾ Numonyx P33 Flash Family ⁽³⁾
64 Mbit
v
v
128 Mbit
v
v
256 Mbit
v
v
Notes to Table 9–11:
(1) The AP configuration scheme only supports flash memory speed grades of 40 MHz and above.
(2) 3.3- , 3.0-, 2.5-, and 1.8-V I/O options are supported for the Numonyx P30 flash family.
(3) 3.3-, 3.0- and 2.5-V I/O options are supported for the Numonyx P33 flash family.
The AP configuration scheme of Cyclone III devices supports the Numonyx P30 and
P33 family 64-, 128-, and 256-Mbit flash memories. Configuring Cyclone III devices
from the Numonyx P30 and P33 family 512-Mbit flash memory is possible, but you
must properly drive the extra address and FLASH_nCE pins as required by these flash
memories.
1 You must refer to the respective flash data sheets to check for supported speed grades
and package options.
The AP configuration scheme in Cyclone III devices supports flash speed grades of
40 MHz and above. However, the AP configuration for all these speed grades must be
capped at 40 MHz. The advantage of faster speed grades is realized when your design
in the Cyclone III device accesses flash memory in user mode.
f For more information about the operation of the Numonyx StrataFlash Embedded
Memory P30 and P33 flash memories, search for the keyword “P30” or “P33” on the
Numonyx website (www.numonyx.com) to obtain the P30 or P33 family data sheet.
Cyclone III Device Handbook
Volume 1
December 2011 Altera Corporation