This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

1

SpaceWire Remote Terminal Controller

Torbjörn Hult20 July 2005

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

2

SpaceWire RTC contract

• ESA study

• Prime Contractor: Saab Ericsson Space

• Subcontractor: Gaisler Research

• Foundry: ATMEL, ATC18RT 0,18µ process,multi-project wafer run

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

3

SpaceWire RTC overview

LEON2 SPARC V8Integer Unit

I-Cache D-Cache

AHB master

DebugSupport

Unit

DebugSerial Link

UART

MemoryController

AHB / APBbridge

ADC / DACInterface

GeneralPurpose I/O

FIFOInterface

On-ChipMemory

32-bitTIMERs

AHB master AHB slave

AHBArbiter / Decoder

UARTs

TIMERsGPIO

IRQ

AHB slaveAHB master

AMBA AHB bus

AMBA APB bus

HurriCANeController

AHB master

DundeeSpaceWire

AHB master

CTRL/DMA CTRL/DMA

GRLIB LEON2-FT ESA New

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

4

Processor and Memory• LEON-2 FT VHDL model

• Cache sizing:– 4 kbyte instruction, 4 kbyte data

• On-chip memory sizing:– 64 kbyte EDAC protected

• External memory sizing:– 4 Mbyte PROM (8-bit wide, EDAC)– 8 Mbyte SRAM (8, 16 or 32 bit, EDAC)– 2 Mbyte IO

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

5

FIFO Interface

• Interface: 9-bit / 18-bit data,

read & write strobes, full, half-full, empty,programmable wait states

• Function: stand-alone FIFO interface withactive control of external FIFO devices

• On-chip: AMBA AHB master with DMA

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

6

SpaceWire Functions• SPW CODEC IP used

• RMAP support (Read & Write block)

• Rx and Tx Channels, separate from RMAP

• Time Code, Receive and transmit

• 200 Mbit/s capability, @ 100MHz SPWClock, i.e. DDR only

• I/F to AMBA bus

• Local CPU Support for:- Packet handling (multiple packet, buffer limits, alignment, debug) - Sending RMAP commands (separating header and data, CRC generation, ..)- Transparent reception of Transfer protocols not supported in HW.

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

7

SpaceWire block diagram

CODEC

AHB master

Reg If

RMAPProtocol

RxFIFO

TxFIFOAHB

masterArbiter

RMAPResponseTX

AMBA AHB bus

RX

SpaceWire link

AMBA APB bus

On-ChipMemory

AHB slave

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

8

Rx Functions

• Two Rx Channels, Rx(0) reserved for RMAP, (each separated by unique DLA)

• RMAP: protocol identification, Command interpreter and Error handling,

• MemoryBuffer structure, individual buffers for each Rx Channel.RMAP uses its buffer only for Responses and unsupported Commands.

• CRC8 Checker in HW, for RMAP packets only

• AHB Master (Write only)

• High speed, over clock region transfers>200MBit/s Data transfer rate using 64bit blocks @ 30MHz BusClk and 100MHz TxClk.

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

9

Rx Functions (block diagram)

CODEC

RxFIFORxDMA

Fifo

AH

B M

aste

r(W

rite)

RMAPResponse

(32Byte)

DLA, RMAP

TransferReq

RxClkto

BusClk(64 bit)

SPWRegionFSM

(8*4Byte)

BusRegionFSM

TransferRdy

SPWClkBusClk

RxDmaAddr,Count,Conf

Interrupt

RxChannel Registers,one set for each DLA(RMAP uses one of the sets)

CRC8check

RMAP ReadAddr, Size

SpaceWire link

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

10

Tx Functions

• Two Tx Channels, Tx(0) reserved for RMAP)

• Arbiter, RMAP TxChannel has highest priority

• Send list memory structure, up to 255 entries for each Tx Channel sendlist structure allows separate handling of header and raw data.

• CRC8 Generation in HW, for RMAP packets only

• AHB Master (Read only)

• High speed, over clock region transfers>200MBit Data transfer rate using 64bit blocks @ 30MHz BusClk and 100MHz TxClk

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

11

Tx Functions (block diagram)

CODECTxFIFO

TxDMAFifo

AH

B M

aste

r(R

ead)

RMAPResponse

(32Byte)

RMAPReadAddrSize

TransferReq

BusClkto

TxClk(64 bit)

SPWRegionFSM

(TBD Byte)

BusRegionFSM

TransferRdy

SPWClk

BusClk

TxDmaSendList

&Counters

Interrupt

TxChannel Registers,one set for each DLA(RMAP uses one of the sets)

CRC8GenTx

DMAChan.

TxArbiter

RMAPReq

SpaceWire link

This document or software is confidential to Saab Ericsson Space and may not:

a) be used for any purpose other than for which it was supplied;b) be copied or reproduced in whole or in part without the prior written consent of Saab Ericsson Space;c) be disclosed to any third party without the prior written consent of Saab Ericsson Space.

12

TimeCode

CODEC

Reg If

AMBA APB bus

TxTimeReg

TxTimeCtrlReg

TimeCodeEqualCheck

TimeTick

+1

TimeTick (Qualified)

TimeCtrl(2 bits)

RxTimeCnt

RxTimeCtrlReg

+1

TimeCtrl(2 bits)

TimeTick

TimeTick

TimeCtrl(2 bits)

TimeCtrl(2 bits)

SpaceWire link