EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 433

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Altera Corporation
October 2007
Note to
(1)
(2)
AnF
PGM[23..0]
Wd_en
Wd_timer[11..0]
Table 12–3. Remote System Upgrade Control Register Contents
Control Register Bit
In remote update mode, the remote configuration block does not update the AnF bit automatically (you can update
it manually).
This is the default value of the control register bit.
(1)
Table
12–3:
Remote update
Remote update
Remote update
Remote update
Figure 12–6. Remote System Upgrade Control Register
The application-not-factory (AnF) bit indicates whether the current
configuration loaded in the Stratix III device is the factory configuration
or an application configuration. This bit is set low by the remote system
upgrade circuitry when an error condition causes a fall-back to the
factory configuration. When the AnF bit is high, the control register access
is limited to read operations. When the AnF bit is low, the register allows
write operations and disables the watchdog timer.
In remote update mode, factory configuration design sets this bit high
(1'b1) when updating the contents of the update register with the
application page address and watchdog timer settings.
Remote System
Upgrade Mode
37 36 35 34 33 32 31 30 29 28 27 26
Wd_timer[11..0]
1'b0
24'b0×000000
1'b0
12'b000000000000
Remote System Upgrades With Stratix III Devices
Value
(2)
Stratix III Device Handbook, Volume 1
Wd_en
25
Application not factory
AS configuration start address
(
User watchdog timer enable bit
User watchdog time-out value
(most significant 12 bits of 29-
bit count value:
{
17'b0}
StAdd[23..0]
Wd_timer[11..0]
24 23 22 .. 3
)
PGM[23..0]
Definition
)
2
1
,
AnF
0
12–11