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

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

3.4.2.2. I/O Bank 2K, Lane 3 (ECC)

The Arria 10 EMIF for HPS IP core fixes the location for the ECC-related DQ/DQS data group signals in I/O Lane 3 of I/O Bank 2K.

GUIDELINE: Lane 3 of I/O Bank 2K is for the exclusive use of ECC data by the Arria 10 EMIF for HPS IP core.

If you use ECC on the HPS EMIF, the DQ/DQS data lane signals corresponding to the ECC data must be located in this specific I/O lane. If you don’t use ECC, general HPS EMIF data cannot be located in this I/O lane.

GUIDELINE: Unused pins in I/O Lane 3 of I/O Bank 2K are available as FPGA GPI.

Pins not utilized by the Arria 10 EMIF for HPS IP core for ECC in I/O Lane 3 of I/O Bank 2K are available to the FPGA fabric as general purpose inputs (input-only). If your Arria 10 EMIF for HPS IP configuration does not use ECC and therefore does not use Lane 3, the unused pins are still available, but as inputs-only. FPGA GPI signals assigned to unused pin locations in Lane 3 support I/O standards compatible with I/O Bank 2K’s VCCIO and VREF supply levels, which are dictated by the external SDRAM’s signaling standard.