SBWP Slave is full-featured, easy-to-use, synthesizable design, compatible with standard protocol of Safe-by-Wire Plus Specification. Through its SBWP compatibility, it provides a simple interface to a wide range of low-cost devices. SBWP Slave IIP is proven in FPGA environment. The host interface of the SBWP Slave can be simple interface or can be AMBA APB, AMBA AHB, AMBA AHB-Lite, AMBA AXI, AMBA AXI-Lite, VCI, OCP, Avalon, PLB, Tilelink, Wishbone or Custom protocol.
SBWP Slave IIP is supported natively in Verilog and VHDL
- Features
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- Compliant with version 2.0 Safe-by-Wire Plus Specifications
- Full SBWP Slave functionality
- Supports occupant restraints bus for deployable devices and for sensors
- Deployment bus for squibs and optionally for static occupancy sensors
- sensor bus for smart or simple impact sensors, dynamic occupancy sensors and optionally for static occupancy sensors
- combined sensor / deployment bus
- Supports Bi-directional two-wire bus with integrated power distribution
- Master-Slave operation
- Babbling-idiot protection for deploy messages from master
- Provides optional interrupt possibilities for smart impact sensors
- Optional multi-master operation
- Supports variable bus speed with self-clocking slaves
- 20 kbps, 40 kbps, 80 kbps or 160 kbps +/- 13%
- Data throughput example: at 160 kbps, (=160 kHz):
- * Transfer time of a deploy message controlling up to 12 deployable devices < 200 μs
- * Transfer time for retrieving 8-bit data from 3 impact sensors < 250 μs
- Supports, but does not require, speed change for high-speed deployment messages, initiated by the master
- Supports, but does not require, speed change for high-speed sensor polling messages, initiated by sensors ("interrupt" from sensor)
- Supports flexible bus topologies: bus, tree, ring, mixed
- Allows design of daisy chain systems, parallel systems and mixed systems
- Bus length of parallel systems up to 40 m
- Bus length of daisy-chain systems up to 25 m
- Supports real-time recovery from single-point bus shorts to any voltage within specified range
- Supports communication error detection by transmitter (data read-back) and by receiver (CRC)
- Supports multi-level protection against inadvertent deployment
- Detection of bit errors by master and by slave
- Special bus level reserved for deploy messages ("analog safing")
- Deployment only possible after charging of the energy reserve capacitor (ERC) in the deployable device
- Deployment only possible when deploy-enable message has been sent before
- Supports the use of two deploy switches, which can be controlled and diagnosed independently over the bus
- Allows the use of small hold-up capacitors in the slaves
- Fully synthesizable
- Static synchronous design
- Positive edge clocking and no internal tri-states
- Scan test ready
- Simple interface allows easy connection to Microprocessor/Microcontroller devices
- Benefits
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- Single Site license option is provided to companies designing in a single site.
- Multi Sites license option is provided to companies designing in multiple sites.
- Single Design license allows implementation of the IP Core in a single FPGA bitstream and ASIC.
- Unlimited Designs, license allows implementation of the IP Core in unlimited number of FPGA bitstreams and ASIC designs.
- Deliverables
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SmartDV's SBWP Slave IP contains following
- The SBWP Slave interface is available in Source and netlist products.
- The Source product is delivered in verilog. If needed, VHDL and SystemC can also be provided
- Easy to use Verilog Test Environment with Verilog Testcases
- Lint, CDC, Synthesis, Simulation Scripts with waiver files
- IP-XACT RDL generated address map
- Firmware code and linux driver package
- Documentation contains User's Guide and Release notes.
