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The TTPController is an integrated device which implements functionalities and features described in the SAE AS6003 standard. It is designed using the DO 254-compliant C2NF chip and is commercially available in its third generation. Application notes and datasheet are available on-line.

SAE AS6003 compliant communication controllers can be directly ordered at TTTech. Please contact

Mature TTTech TTP silicon solutions
Standard TTP controllers are readily available for cross industry applications. Examples of successful applications include modular and distributed control systems in the Boeing 787 Dreamliner and the Airbus A380, engine control in the Lockheed Martin F-16 and the Aermacchi M-346, as well as fly-by-wire systems on Embraer 450/500 and on Bombardier CSeries. The maturity and stability of the TTP protocol is demonstrated by the fact that TTP controllers have been available on the market since 1998. Since 2011 TTP is also an open SAE industry standard i.e. AS6003. TTTech's TTP solutions are fully compliant to this standard.

DO-254 level A certifiable silicon and IP for safety-critical applications
TTP supports the development of distributed, hard real-time, safety-critical and fault-tolerant systems for aerospace and cross industry applications. The TTP silicon and chip IP has been designed to meet aerospace requirements in compliance with DO-254 and DO-178B Level A and got certified within the Airbus A380 project.

"Since we released our first TTP product in 1998, the TTP controller family has greatly increased our market strength in the field of aerospace applications."

General Manager Industry & Medical Business Unit, ams

Key benefits

  • Dual-channel controller for redundant data transfers
  • Dedicated controller supporting TTP (time-triggered protocol class C)
  • Suited for dependable distributed real-time systems with guaranteed response time
  • Asynchronous data rate up to 5 Mbit/s (MFM/Manchester)
  • Synchronous data rate 5 to 25 Mbit/s
  • Bus interface (speed, encoding) for each channel selectable independently
  • 40 MHz main clock with support for 10 MHz crystal, 10 MHz oscillator or 40 MHz oscillator
  • 16 MHz bus guardian clock with support for 16 MHz crystal or 16 MHz oscillator
  • Single power supply 3.3V, 0.35 µm CMOS process
  • 80 pin LQFP80 Package
  • Operating temperature range from -40ºC to 125ºC
  • 16k x 16 SRAM for message, status, control area (communication network interface) and for scheduling information (MEDL)
  • 4k x 16 (plus parity) instruction code RAM for protocol execution code
  • Data sheet conforms to protocol revision 2.04
  • 16k x 16 instruction code ROM containing startup execution code and deprecated protocol code revision 1.00
  • 16 Bit non-multiplexed asynchronous host CPU interface
  • 16 Bit RISC architecture
  • Software tools, design support, development boards available
  • Certification support package according to RTCA/DO-254 DAL A available

Application notes




Waveform and Time Difference Capturing with C2NF’s TTP Manchester Encoding


MFM Physical Layer for TTP/C Appnote: Calculating Time Skew Requirements


Receiver Bug 001 in AS8202NF


Host Read Accesses Speedup in AS8202NF


Maximal Data-Rates of TTTech Systems


Reception Scheme Changed for Ignoring IFG Traffic / Transformer Noise during Synchronized Operation


Changed Transformer Noise Tolerance in Manchester Mode in AS8202NF


TTP/C Protocol Binary Release 2.04 for the AS8202NF Controller


2nd Bang Hold-Off Implementation Approach


AS8202NF / C2NF – CRC Calculation


Comments on Dead/Deactivated Code in TASM Software V2.04 of the AS8202NF


AS8202NF TASM Software V2.04 MFM RS485 Bug


AS8202NF (TTP/C-C2NF Controller) Connected to MII Transceiver


Data Bus Instability by Read Access to the Last Word in Page in AS8202NF


TTP/C Controller AS8202NF User Constraints Document


AS8202NF Host View of Membership during Controller Acknowledgment Phase


AS8202NF Big Bang Configuration Constraints


Application Constraints Using AS8202NF Timer Interrupt


Constraints using MFM Encoding on AS8202NF


Constraints read access of last word in a memory page of the AS8202NF


Protocol binary update to version 2.05


AS8202NF PLL lock detection circuitry indicates unjustified PLL-unlock signal


TTP-Controller Deactivation Constraints


Impact of TTP-Controller Deactivation Constraints (D-CHIP-AN-10-002) [2] on TTP middleware implementations

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