MAX 10 Startup Delay

[Altera_Forum]

I am experiencing a long delay between power up and the MAX 10 device starting to operate. This delay can be anything from under 1 second (acceptable) to 40 seconds or more. 

  

• Device: 10M02SCE144C8G single supply (3.3V) device. 
• Programmer Hardware: ByteBlaster II programmer through the JTAG port. 
• Compiler / Programmer Software: Quartus Prime 16.1.2 

  Device Settings:  

• Operating Settings and Conditions: Voltage, VCCA voltage: 3.3V 
• Device Assignments -Voltage 
• Default I/O standard: 3.3-V LVTTL 
• Core voltage: 1.2V (default and cannot be changed) 
• Device Assignments - Configuration: 
• Configuration scheme: Internal Configuration 
• Configuration mode: Single Uncompressed Image (96Kbits UFM) 
• Force VCCIO to be compatible with configuration I/O voltage - yes 
• Generate compressed bitstreams - on 
• Device Assignments - General (check boxes): 
• Auto-restart configuration after error - on 
• Release clears before tri-states - off 
• Enable device-wide reset (DEV_CLRn) - off 
• Enable device-wide output enable (DEV_OE) - off 
• Enable nCONFIG,nSTATUS, and CONF_DONE pins - off 
• Enable JTAG pin sharing - off 
• Enable CONFIG_SEL pin - off 
• The Configuration Pins listed above are assigned as outputs to drive logic, except for nCONFIG which is connected to a pull-up resistor (100K to 3.3V) and a push button switch. 
• Power On Reset scheme: Instant ON (this is default and cannot be changed) 

  Power Supply: 

• Voltage: 3.3V 
• 3.3V Ramp Up time (tRAMP): 980uS 

  This delay also occurs after programming the device using a .pof file. When using a .sof file to program the device, the start up is instant. I have tried 3 different boards and all three boards have the same issue / behavior.  Any advice / ideas? What am I missing here?  Regards, Sean

[Altera_Forum]

I have managed to resolve this issue by adding a 10K pull-up resistor (to 3.3V) to the CONF_DONE pin. Device now starts up instantly every time. 

 Regards, Sean