Avionics, Space & Mil-Std Networking

ECSS-CAN Onboard Bus

ecsscan is an ECSS-E-ST-50-15C “CANbus extension protocol” layer — the European spacecraft onboard-bus standard — delivered as synthesizable…

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ASIL-B

target

93.20%

SPFM

88.36%

LFM

PASS

FMEDA

1.2K

gates

1.0.0

version

The deliverable

What you’re licensing

ecsscan is an ECSS-E-ST-50-15C “CANbus extension protocol” layer — the European spacecraft onboard-bus standard — delivered as synthesizable… It is delivered as a licensable soft-IP block engineered as an ASIL-B Safety Element out of Context — not just RTL, but the complete functional-safety work package needed to carry it into an ISO 26262 program:

Synthesizable RTL

Portable, vendor-neutral SystemVerilog that drops onto your existing SoC fabric — no foundry or EDA-tool lock-in.

Per-IP FMEDA report

SPFM / LFM / PMHF computed against the ASIL target per ISO 26262-5 — the quantitative analysis your assessor asks for.

Safety manual

Assumptions of use, the safety mechanisms and their diagnostic coverage — written to drop straight into your safety case.

IP-XACT + integration docs

A machine-readable descriptor plus register and integration documentation for fast, low-risk bring-up.

Self-checking testbench

A self-checking (crypto: bit-exact) testbench and a one-command build, so you can reproduce every claim on day one.

What it is

ecss_can is an ECSS-E-ST-50-15C “CANbus extension protocol” layer — the European spacecraft onboard-bus standard — delivered as synthesizable SystemVerilog soft-IP with an APB4-lite control interface and built-in ISO 26262 (ASIL-B) / space-grade safety instrumentation.

Key Features

Dual-bus A/B redundancy + automatic failover
Onboard time distribution (master/slave)
CANopen OD / SDO / heartbeat
Redundancy/time-sync/heartbeat loss (\rightarrow) err_code 4
OD/ID plausibility (err_code 3) + FSM DMR (err_code 9) + config parity (err_code 1)
Pairs with can_fd/can_xl MAC + rad_tol_wrap

Standards & Compliance

ECSS-E-ST-50-15C (Spacecraft CAN) + CANopen (CiA 301); space device assurance to ECSS-Q-ST-60-02C, radiation ECSS-Q-ST-60-13 (TID/SEE/SEL); ISO 26262 FMEDA (SPFM/LFM/PMHF) carried as transferable random-fault evidence

Functional Safety

ASIL-B (SEooC) · SPFM 93.20% · LFM 88.36% · PASS

ISO 26262-5 FMEDA method (transferable evidence for the ECSS-Q-ST-60 / radiation case) · FMEDA available · Safety Manual included

Register Map

Offset	Register	Description
`0x00`	CTRL	[0]=EN [1]=REDUN_EN [2]=TIME_MASTER [3]=TIME_SLAVE [4]=HB_EN
`0x04`	NODECFG	[6:0]=NODE_ID [15:8]=HB_PERIOD(x256 cyc)
`0x08`	STATUS	(RO) [0]=ACTIVE_BUS(0=A,1=B) [1]=A_ALIVE [2]=B_ALIVE [3]=SYNC_OK [4]=HB_OK [7:5]=fsm_state
`0x0C`	TIME_VAL	time-master: write the 32-bit onboard time to distribute
`0x10`	TIME_PULSE	time-master: write 1 -> emit a TIME message carrying TIME_VAL

…5 more registers — see datasheet for the full table.

Getting Started

// Minimal instantiation
ecss_can #(
  .ADDR_W(6)
) u_ecss_can (
  .clk       (clk),
  .rst_n     (rst_n),
  // APB4
  .p_paddr   (paddr),
  .p_psel    (psel),
  .p_penable (penable),
  .p_pwrite  (pwrite),
  .p_pwdata  (pwdata),
  .p_prdata  (prdata),
  .p_pready  (pready),
  // Safety
  .err_clear (1'b0),
  .err_valid (err_valid),
  .err_code  (err_code)
);

Configure via the CTRL register after reset to enable the IP and set operating parameters. Monitor err_valid / err_code for any safety faults reported by the built-in safety monitor.

Applications

Where it fits

Typically deployed in avionics, defense, and space systems built to the ARINC, MIL-STD, and CCSDS standards.

The case

Why license it, not build it

Skip 12–18 months

The FMEDA and the safety case are already generated. You integrate a finished safety element — you don’t stand up a safety-IP program to originate one.

One vendor, one safety story

Every block in the catalog shares the same safety architecture, fault-reaction model, and FMEDA methodology — so subsystems roll up cleanly.

Verified, not vapor

The RTL builds and passes today; the safety metrics come from analysis and fault injection against real RTL, not a datasheet promise.

Interested in ECSS-CAN Onboard Bus?

Pricing, the per-IP FMEDA, safety manual, and RTL data room are shared under a mutual NDA.

Talk to us →See related IP

Figures are pre-silicon engineering-grade estimates for a Safety Element out of Context (SEooC); final ASIL sign-off is the integrator’s, supported under NDA. FMEDA and Safety Manual available under NDA.

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