EP2S90F1020C5 Datasheet, PDF (687/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

Remote System Upgrades with Stratix II and Stratix II GX Devices
Table 8–11. Output Ports of the altremote_update Megafunction (Part 2 of 2)
Port Name
Required Destination
Description
data_out[11..0]
N
Logic Array 12-bit bus used when reading parameters, which reads out the
parameter value. The parameter value is requested using the
param[] input and by driving the read_param signal logic
high, at which point the busy signal goes logic high. When the
busy signal goes low, the value of the parameter is driven out
on this bus. The data_out[] port is only valid after a
read_param has been issued and once the busy signal is
deasserted. At any other time, its output values are invalid. For
example, even though the data_out[] port may toggle
during a writing of a parameter, these values are not a valid
representation of what was actually written to the remote
update block. For some parameters, not all 12 bits are used, in
which case only the least significant bits are used.
Note to Table 8–11:
(1) Logic array destination means that you can drive the port to internal logic or any general-purpose I/O pin.
Table 8–12. Parameter Settings for the altremote_update Megafunction (Part 1 of 2)
Selected
Parameter
param[2..0]
Bit Setting
Width of
Parameter
Value
POR Reset
Value
Description
Status
Register
Contents
000
5
5 bit '0
Specifies the reason for re-configuration,
which could be caused by a CRC error during
configuration, nSTATUS being pulled low due
to an error, the device core caused an error,
nCONFIG pulled low, or the watchdog timer
timed-out. This parameter can only be read.
Watchdog
010
Timeout Value
12
12 bits '0 User watchdog timer time-out value. Writing of
this parameter is only allowed when in the
factory configuration.
Watchdog
011
1
1 bit '0
User watchdog timer enable. Writing of this
Enable
parameter is only allowed when in the factory
configuration
Page select
3 bit '001' - Local Page mode selection. Writing of this parameter
configuration is only allowed when in the factory
3 (FPP, PS,
PPA)
3 bit '000' - ^{configuration.}
100
Remote
configuration
7 (AS)
7 bit '0000000' -
Remote
configuration
Altera Corporation
January 2008
8–27
Stratix II Device Handbook, Volume 2