A High Bandwidth Memory controller and PHY-facing interface covering HBM2, HBM2E and HBM3, with HBM3E and an HBM4 draft path. Per-channel controllers decompose the host address into channel, pseudo-channel, bank group, bank, row and column, an FR-FCFS scheduler tracks per-bank state and bank-group timing, and a DFI 5.0 interface drives the PHY, with on-die ECC, refresh management and PHY training built in.
| Category | Memory controller, High Bandwidth Memory interface |
|---|---|
| Standards | JEDEC HBM2, HBM2E, HBM3 (HBM3E and HBM4 draft paths) |
| Interface width | 1024-bit stack, 8 channels (HBM2) or 16 channels (HBM3), two pseudo-channels per channel |
| Bank topology | Bank groups of four banks, up to 32 banks per channel (HBM3), CAS timing tracked per bank group |
| Access granularity | 32-byte aligned access across all generations |
| Host interface | AXI4 256-bit data, 34-bit address, APB CSR configuration |
| Scheduler | FR-FCFS, row-hit priority, QoS and age based, tCCD and tFAW aware |
| Address mapping | RBC, BRC, BRCC and RBCC schemes, channel and bank-group interleave |
| PHY interface | DFI 5.0, configurable frequency ratio, integrated PHY training FSM |
| RAS | On-die ECC (SECDED), data bus inversion, command and data parity, refresh management (RFM) |
| Refresh and power | All-bank and per-bank refresh, temperature-adaptive rate, power-down, self-refresh, deep power-down |
| Verification | UVM VIP, JEDEC timing SVA, scoreboard, functional coverage, DRAM model |
| Ownership | WIOWIZ IP and WIOWIZ VIP |
Independent per-channel controllers with a round-robin arbiter on the shared host return path.
Row-hit first scheduling with per-bank state machines, bank-group timing and age-based anti-starvation.
RBC, BRC and interleaved schemes trade open-page locality against multi-channel bandwidth.
Configurable frequency ratio and a training FSM covering write leveling, read DQS and VREF.
On-die ECC, data bus inversion, command and data parity, and refresh management alerts.
JEDEC timing assertions, scoreboard and coverage, WIOWIZ IP and VIP.
