EP2S180F1020C4 Datasheet, PDF (669/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

Remote System Upgrades with Stratix II and Stratix II GX Devices
1 Also, local update mode does not support AS configuration with
the serial configuration devices because these devices don’t
support a dynamic pointer to page 001 start address location.
Table 8–2 details the differences between remote and local update modes.
Table 8–2. Differences Between Remote and Local Update Modes
Features
Remote Update Mode
RUnLU input pin setting
1
Page selection upon
power up
PGM[2..0] = 000
(Factory)
Supported configurations MAX II device or
microprocessor-based
configuration, serial
configuration, and
enhanced configuration
devices (FPP, PS, AS,
PPA)
Number of pages
supported
Eight pages for external
host or controller based
configuration; up to 128
pages (512 KBits/page)
for serial configuration
device
User watchdog timer
Available
Remote system upgrade
control and status
register
Read/write access
allowed in factory
configuration. Read
access in application
configuration
Local Update Mode
0
PGM[2..0] = 001
(Application)
MAX II device or
microprocessor-based
configuration and
enhanced configuration
devices (FPP, PS, PPA)
Two pages
Disabled
Only status register read
access allowed in local
update mode (factory and
application
configurations). Write
access to control register
is disabled
Remote Update Mode
When Stratix II and Stratix II GX FPGAs are first powered up in remote
update mode, it loads the factory configuration located at page zero (page
address pins PGM[2..0] = "000"; page registers PGM[6..0] =
"0000000"). You should always store the factory configuration image
for your system at page address zero. A factory configuration image is a
bitstream for the FPGA(s) in your system that is programmed during
production and is the fall-back image when errors occur. This image is
stored in non-volatile memory and is never updated or modified using
Altera Corporation
January 2008
8–9
Stratix II Device Handbook, Volume 2