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1. Intel® MAX® 10 External Memory Interface Overview
2. Intel® MAX® 10 External Memory Interface Architecture and Features
3. Intel® MAX® 10 External Memory Interface Design Considerations
4. Intel® MAX® 10 External Memory Interface Implementation Guides
5. UniPHY IP References for Intel® MAX® 10 Devices
6. Intel® MAX® 10 External Memory Interface User Guide Archives
7. Document Revision History for the Intel® MAX® 10 External Memory Interface User Guide
2.1. Intel® MAX® 10 I/O Banks for External Memory Interface
2.2. Intel® MAX® 10 DQ/DQS Groups
2.3. Intel® MAX® 10 External Memory Interfaces Maximum Width
2.4. Intel® MAX® 10 Memory Controller
2.5. Intel® MAX® 10 External Memory Read Datapath
2.6. Intel® MAX® 10 External Memory Write Datapath
2.7. Intel® MAX® 10 Address/Command Path
2.8. Intel® MAX® 10 PHY Clock (PHYCLK) Network
2.9. Phase Detector for VT Tracking
2.10. On-Chip Termination
2.11. Phase-Locked Loop
2.12. Intel® MAX® 10 Low Power Feature
3.1. Intel® MAX® 10 DDR2 and DDR3 Design Considerations
3.2. LPDDR2 Design Considerations
3.3. Guidelines: Intel® MAX® 10 DDR3, DDR2, and LPDDR2 External Memory Interface I/O Limitation
3.4. Guidelines: Intel® MAX® 10 Board Design Requirement for DDR2, DDR3, and LPDDR2
3.5. Guidelines: Reading the Intel® MAX® 10 Pin-Out Files
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3.2.1.2. Data Mask Pins
In Intel® MAX® 10 devices, the data mask (DM) pins are pre-assigned in the device pinouts. Although the Intel® Quartus® Prime Fitter treats the DQ and DM pins in a DQS group equally for placement purposes, the pre-assigned DQ and DM pins are the preferred pins.
Each group of DQS and DQ signals has one DM pin:
- You require data mask (DM) pins only while writing to the external memory devices.
- A low signal on the DM pin indicates that the write is valid.
- Driving the DM pin high causes the memory to mask the DQ signals.
- Similar to the DQ output signals, the DM signals are clocked by the –90º shifted clock.