Transcript Controllers
ΗΥ220 Εργαστήριο Ψηφιακών Κυκλωμάτων Χειμερινό Εξάμηνο 2006-2007 SoC: System on Chip ΗΥ220 - Βασίλης Παπαευσταθίου 1 Moore’s Law Gordon Moore (co-founder of Intel) predicted in 1965 that the transistor density of semiconductor chips would double roughly every 18 months. How can we use all this huge amount of transistors ? ΗΥ220 - Βασίλης Παπαευσταθίου 2 PCB (board) design Interconnection of Chips Motherboard Processor A BRIDGE SRAM controller DRAM controller SRAM DRAM UART controller ΗΥ220 - Βασίλης Παπαευσταθίου Processor B AGP (graphics) 3 System On Chip (SoC) – Interconnection of blocks Single Chip Processor A BRIDGE SRAM controller DRAM controller SRAM DRAM UART controller ΗΥ220 - Βασίλης Παπαευσταθίου Processor B AGP (graphics) 4 Ορισμός του SoC • Virtual Socket Interface (VSI) Alliance: “Highly integrated device. Also known as system on silicon, system-on-a-chip, system-LSI, system-ASIC” • Our view of an SoC design is defined by extensive use of reusable IP blocks, and mixed HW/SW design issues: -Programmable processor -Controllers (memory, uart, gpio…) -Embedded memory -Digital signal processors -System bus + interfaces -Embedded programmable logic -Embedded software -Analog components … ΗΥ220 - Βασίλης Παπαευσταθίου 5 Κίνητρα για SoC Design What is driving the industry to develop the SoC design methodology ? •Higher productivity levels •Lower overall cost •Lower overall power •Faster design •Smaller form factor •Higher integration levels •Rapid development of derivative designs ΗΥ220 - Βασίλης Παπαευσταθίου 6 SoC vs SiP vs SoB ΗΥ220 - Βασίλης Παπαευσταθίου 7 IP (Intellectual Property) Cores in use today IP cores : A library of modules (blocks) that can be used in a design. • • • • • • • • RISC: ARM, MIPS, PowerPC, SPARC CISC: 680x0 x86 Interfaces: USB, PCI, UART, Rambus Encryptions: DES, AES Multimedia: JPEG coder, MPEG decoder Networking: ATM switch, Ethernet Microcontroller: HC11, etc. DSP: OAK, TI, etc. SoC is forcing companies to develop high-quality IP blocks to stay in business. ΗΥ220 - Βασίλης Παπαευσταθίου 8 On-chip Standardized Bus Structures •AMBA (ARM) •Core Connect (IBM) •OCP-IP (VSI) CPU Co-processor Cache Processor On-chip bus Core CPU Bridge Core Arbiter System On-chip bus IP’s with high bandwidth Core Core OCB Bridge Peripheral On-chip bus IP’s with low bandwidth ΗΥ220 - Βασίλης Παπαευσταθίου 9 Παράδειγμα SoC ΗΥ220 - Βασίλης Παπαευσταθίου 10 Hardware/Software Co-design Reuse design libraries (hardware) and device drivers (software) Primarily software SYSTEM DEF. FUNCT DESIGN VIRTUAL PROTOTYPE HW & SW PART. HW DESIGN HW FAB SW DESIGN SW CODE ΗΥ220 - Βασίλης Παπαευσταθίου Primarily hardware INTEG. & TEST 11 Platform Based Design • Idea : A core-based design from which you can easily derive new designs without changing the main functionality by replacing some cores. • What is platform ? -A stable core-based architecture for a target application -Can be rapidly extended and customized • What are the benefits of a platform ? -Major benefit -Increased productivity -Derivative designs can be easily created -Using software or hardware modifications -Reduces the design time and increasing success rate • Platform Examples: x86 CPU based family, Bluetooth ΗΥ220 - Βασίλης Παπαευσταθίου 12 Ανακεφαλαίωση! Design Flow •System •HW design •Verification Hardware Design •Full-custom •Semi-custom SoC CAD tools Verilog HDL VHDL Synopsys FSM •Memories •Buses •Asynch •Schedulers ΗΥ220 - Βασίλης Παπαευσταθίου 13