TTP-C2NF Communication Controller0 pages

AS8202NF
TTP-C2NF Communication Controller
Data Sheet
www.austriamicrosystems.com and
TTTech Computertechnik AG Revision 2.1 1 - 20
1 General Description
The AS8202NF communication controller is an integrated device supporting serial communication according to the TTP specification version 1.1. It performs all communication tasks such as reception and transmission of messages in a TTP cluster without interaction of the host CPU. TTP provides mechanisms that allow the deployment in high-dependability distributed real-time systems. It provides the following services:
.. Predictable transmission of messages with minimal
jitter
.. Fault-tolerant distributed clock synchronization
.. Consistent membership service with small delay
.. Masking of single faults
2 Key Features
.. 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, 0.35ìm CMOS process
.. Full automotive temperature range (-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 (www.tttech.com)
.. Certification support package according to RTCA/
DO-254 DAL A available (www.tttech.com)
.. 80 pin LQFP80 Package
3 Applications
Application fields: automotive (by-wire braking, steering, vehicle dynamics control, drive train control), aerospace (aircraft electronic systems), industrial systems, railway systems.Figure 1. Block DiagramD[15:0]A[11:0]CEBOEBWEBREADYBINTBLED[2:0]RAM_CLK_TESTSEUSE_RAM_CLKXIN0XOUT0PLLOFFRESETBQuartz or OscillatorHost ProcessorInterfaceRxD[1:0]RXCLK[1:0]RxDV[1:0]RXER[1:0]XIN1XOUT1TxD[1:0]CTS[1:0]TxCLK[1:0]RAM_CLK_TESTSEFTESTSTESTFIDISTTESTTest InterfaceTTP Bus Media DriversCommunication network interface(CNI)TTP Protocolprocessor coreInstruction memory RAM & ROMTestInterfaceTransmitterBus guardianReceiverAS8202NF