MAX 10 Startup Delay

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