EP4CE40F29C8N Altera, EP4CE40F29C8N Datasheet - Page 243

• Manufacturer Part Number: EP4CE40F29C8N
• Description: IC CYCLONE IV FPGA 40K 780FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE40F29C8N

• Number Of Logic Elements/cells: 39600
• Number Of Labs/clbs: 2475
• Total Ram Bits: 1134000
• Number Of I /o: 532
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 780-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Remote System Upgrade
Table 8–23. Remote System Upgrade Previous State Register 1 and Previous State Register 2 Contents in Status Register
© December 2010 Altera Corporation
Status Register Bit
25:24
23:0
30
29
28
27
26
1
nCONFIG source
CRC error source
nSTATUS source
User watchdog timer source
Remote system upgrade
nCONFIG source
Master state machine
current state
Boot address
If a capture is inappropriately done while capturing a previous state before the system
has entered remote update application configuration for the first time, a value outputs
from the shift register to indicate that the capture is incorrectly called.
Remote System Upgrade State Machine
The remote system upgrade control and update registers have identical bit
definitions, but serve different roles
can only be updated when the device is loaded with a factory configuration image,
the update register writes are controlled by the user logic, and the control register
writes are controlled by the remote system upgrade state machine.
In factory configurations, the user logic should send the option bits (Cd_early and
Osc_int), the configuration address, and watchdog timer settings for the next
application configuration bit to the update register. When the logic array
configuration reset (RU_nCONFIG) goes high, the remote system upgrade state
machine updates the control register with the contents of the update register and
starts system reconfiguration from the new application page.
To ensure the successful reconfiguration between the pages, assert the RU_nCONFIG
signal for a minimum of 250 ns. This is equivalent to strobing the reconfig input of
the ALTREMOTE_UPDATE megafunction high for a minimum of 250 ns.
If there is an error or reconfiguration trigger condition, the remote system upgrade
state machine directs the system to load a factory or application configuration (based
on mode and error condition) by setting the control register accordingly.
Table 8–24
possible error or trigger conditions.
The remote system upgrade status register is updated by the dedicated error
monitoring circuitry after an error condition, but before the factory configuration is
loaded.
Definition
lists the contents of the control register after such an event occurs for all
One-hot, active-high field that describes the reconfiguration source
that caused the Cyclone IV device to leave the previous application
configuration. If there is a tie, the higher bit order indicates
precedence. For example, if nCONFIG and remote system upgrade
nCONFIG reach the reconfiguration state machine at the same time,
the nCONFIG precedes the remote system upgrade nCONFIG.
The state of the master state machine during reconfiguration causes
the Cyclone IV device to leave the previous application configuration.
The address used by the configuration scheme to load the previous
application configuration.
(Table 8–20 on page
Description
8–74). While both registers
Cyclone IV Device Handbook, Volume 1
8–77