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8-32
Remote System Upgrade Circuitry
SV51010
2014.01.10
Related Information
A detailed description of the configuration sequence in the remote update mode.
Remote System Upgrade Circuitry
The remote system upgrade circuitry contains the remote system upgrade registers, watchdog timer, and a
state machine that controls these components.
Note: If you are using the ALTREMOTE_UPDATE megafunction, the megafunction controls the RU_DOUT ,
RU_SHIFTnLD , RU_CAPTnUPDT , RU_CLK , RU_DIN , RU_nCONFIG , and RU_nRSTIMER signals internally to
perform all the related remote system upgrade operations.
Figure 8-23: Remote System Upgrade Circuitry
Internal Oscillator
Status Register (SR)
[4..0]
Control Register
[37..0]
Logic Array
Update Register
[37..0]
update
dout
Bit [4..0]
Shift Register
din dout
Bit [37..0]
din
Remote
System
Upgrade
Timeout
User
Watchdog
capture
capture
State
Machine
Timer
clkout capture update
Logic Array clkin
RU_DOUT
RU_SHIFTnLD
RU_CAPTnUPDT
RU_CLK
RU_DIN
RU_nCONFIG
RU_nRSTIMER
Logic Array
Related Information
Provides more information about remote system upgrade circuitry timing specifications.
Enabling Remote System Upgrade Circuitry
To enable the remote system upgrade feature, follow these steps:
1. Select Active Serial x1/x4 or Configuration Device from the Configuration scheme list in the Configu-
ration page of the Device and Pin Options dialog box in the Quartus II software.
2. Select Remote from the Configuration mode list in the Configuration page of the Device and Pin Options
dialog box in the Quartus II software.
Enabling this feature automatically turns on the Auto-restart configuration after error option.
Altera Corporation
Configuration, Design Security, and Remote System Upgrades in Stratix V Devices
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