EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 244

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

8–78
Cyclone IV Device Handbook, Volume 1
Table 8–24. Control Register Contents After an Error or Reconfiguration Trigger Condition
User Watchdog Timer
The user watchdog timer prevents a faulty application configuration from indefinitely
stalling the device. The system uses the timer to detect functional errors after an
application configuration is successfully loaded into the Cyclone IV device.
The user watchdog timer is a counter that counts down from the initial value loaded
into the remote system upgrade control register by the factory configuration. The
counter is 29 bits wide and has a maximum count value of 2
user watchdog timer value, specify only the most significant 12 bits. The remote
system upgrade circuitry appends 17 ' b1000 to form the 29-bits value for the watchdog
timer. The granularity of the timer setting is 2
frequency of the 10-MHz internal oscillator or CLKUSR (maximum frequency of
40 MHz).
CORE triggered reconfiguration
Reconfiguration Error/Trigger
nCONFIG reset
nSTATUS error
Wd time out
CRC error
Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
17
Control Register Setting In Remote Update
cycles. The cycle time is based on the
© December 2010 Altera Corporation
Update register
All bits are 0
All bits are 0
All bits are 0
All bits are 0
29
. When specifying the
Remote System Upgrade