AN 763: Intel® Arria® 10 SoC Device Design Guidelines

ID 683192
Date 5/17/2022
Public
Document Table of Contents

3.4.2.4. I/O Bank, 2I (Data, 64-, 72-bit interfaces)

The Arria 10 EMIF for HPS IP core uses I/O Bank 2I for the upper four non-ECC DQ/DQS data lane signal groups for 64-, 72-bit interfaces. For interfaces narrower than 64-bits, I/O Bank 2I is not utilized.

GUIDELINE: I/O pins in lanes NOT utilized by the Arria 10 EMIF for HPS IP are available as FPGA GPIO.

For 16-, 24-, 32-, 40-bit interfaces, the Arria 10 EMIF for HPS IP does not utilize I/O Bank 2I, which leaves the entire bank available to the FPGA fabric as general purpose I/O with no restrictions placed on available I/O standards from the HPS EMIF external SDRAM signaling standard. The usual rules apply.

GUIDELINE: Unused pins in lanes that are utilized by the Arria 10 EMIF for HPS IP are available as FPGA GPI.

For 64-, 72-bit interfaces, all I/O lanes in I/O Bank 2I are utilized, and any unused pins are available to the FPGA fabric as general purpose inputs-only. FPGA GPI signals assigned to unused pin locations in these utilized lanes support I/O standards compatible with I/O Bank 2I’s VCCIO and VREF supply levels, which are dictated by the external SDRAM’s signaling standard.