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Altera_Forum's avatar
Altera_Forum
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16 years ago

VCCIO and EPCS Issue

Hi, All We are using EPCS and CycloneIII device. As EPCS can only support 3.3V, the IO pin connect seems must Power by 3.3V, which means VCCIO of Bank1 in FPGA must tie to 3.3V power. Then h...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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No, Connect MSEL Pins to GND or 2.5V when using a Cyclone III Device.

Also remember that the the JTAG and its pull ups are powered with 2.5V instead 3.3V.

You can use the 2.5V voltage source you need to generate for VCCA Analog PLL power supply via LDO for example.

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One more question is MSEL is in bank6, do the VCCIO of bank6 need to be 2.5V, can I use it as 1.8V?