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Riscduino-SCore(S5)
public project
MPW-8   

Overview

Riscduino is a Single 32 bit RISC V based SOC design pin compatible to arduino platform and this soc targetted for efabless Shuttle program. This project uses only open source tool set for simulation,synthesis and backend tools. The SOC flow follow the openlane methodology and SOC environment is compatible with efabless/carvel methodology.

# Riscduino Block Diagram

Key features

    * Open sourced under Apache-2.0 License (see LICENSE file) - unrestricted commercial use allowed.
    * Dual 32 Bit RISC-V core
    * 2KB SRAM for instruction cache 
    * 2KB SRAM for data cache
    * 2KB SRAM for Tightly coupled memory - For Data Memory
    * Quad SPI Master with 4 Chip select, supports both SPI flash and SRAM interface
    * 2 x UART with 16Byte FIFO
    * USB 1.1 Host
    * I2C Master
    * UART Master
    * Simple SPI Master with 4 Chip select
    * 6 Channel ADC (in Progress)
    * 6 x PWM
    * 3 x Timer (16 Bit), 1us/1ms/1second resolution
    * Pin Compatbible to arudino uno
    * Wishbone compatible design
    * Written in System Verilog
    * Open-source tool set
       * simulation - iverilog
       * synthesis  - yosys
       * backend/sta - openlane tool set
    * Verification suite provided.

Riscduino derivatives

MPW Shuttle on Riscduino

MPW Tape-out Project Name Project Details Github Efabless
MPW-2 18-June-2021 YiFive Single 32bit RISCV core without cache + SDRAM Controller + WB Interconnect Link Link
MPW-3 15-Nov-2021 Riscduino Single 32bit RISCV core without cache + Onchip SRAM + WB Interconnect Link Link
MPW-4 31-Dec-2021 Riscduino-R1 Single 32bit RISCV core with cache + Onchip SRAM + WB Inter Connect Link Link
MPW-5 21-Mar-2022 Riscduino-SCORE Single 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar Link Link
MPW-5 21-Mar-2022 Riscduino-DCORE Dual 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar Link Link
MPW-5 21-Mar-2022 Riscduino-QCORE Quad 32bit RISCV core with cache + Onchip SRAM+ WB Cross Bar Link Link

SOC Pin Mapping

Carvel SOC provides 38 GPIO pins for user functionality. Riscduino SOC GPIO Pin Mapping as follows vs ATMEGA328 and Arudino

ATMGA328 Pin No Functionality Arudino Pin Name Carvel Pin Mapping
Pin-1 PC6/RESET   digital_io[0]
Pin-2 PD0/RXD[0] D0 digital_io[1]
Pin-3 PD1/TXD[0] D1 digital_io[2]
Pin-4 PD2/RXD[1]/INT0 D2 digital_io[3]
Pin-5 PD3/INT1/OC2B(PWM0) D3 digital_io[4]
Pin-6 PD4/TXD[1] D4 digital_io[5]
Pin-7 VCC   -
Pin-8 GND   -
Pin-9 PB6/XTAL1/TOSC1   digital_io[6]
Pin-10 PB7/XTAL2/TOSC2   digital_io[7]
Pin-11 PD5/SS[3]/OC0B(PWM1)/T1 D5 digital_io[8]
Pin-12 PD6/SS[2]/OC0A(PWM2)/AIN0 D6 digital_io[9] /analog_io[2]
Pin-13 PD7/A1N1 D7 digital_io[10]/analog_io[3]
Pin-14 PB0/CLKO/ICP1 D8 digital_io[11]
Pin-15 PB1/SS[1]OC1A(PWM3) D9 digital_io[12]
Pin-16 PB2/SS[0]/OC1B(PWM4) D10 digital_io[13]
Pin-17 PB3/MOSI/OC2A(PWM5) D11 digital_io[14]
Pin-18 PB4/MISO D12 digital_io[15]
Pin-19 PB5/SCK D13 digital_io[16]
Pin-20 AVCC   -
Pin-21 AREF   analog_io[10]
Pin-22 GND   -
Pin-23 PC0/ADC0 A0 digital_io[18]/analog_io[11]
Pin-24 PC1/ADC1 A1 digital_io[19]/analog_io[12]
Pin-25 PC2/ADC2 A2 digital_io[20]/analog_io[13]
Pin-26 PC3/ADC3 A3 digital_io[21]/analog_io[14]
Pin-27 PC4/ADC4/SDA A4 digital_io[22]/analog_io[15]
Pin-28 PC5/ADC5/SCL A5 digital_io[23]/analog_io[16]
Additional Pad used for Externam ROM/RAM/USB
Sflash sflash_sck   digital_io[24]
SFlash sflash_ss0   digital_io[25]
SFlash sflash_ss1   digital_io[26]
SFlash sflash_ss2   digital_io[27]
SFlash sflash_ss3   digital_io[28]
SFlash sflash_io0   digital_io[29]
SFlash sflash_io1   digital_io[30]
SFlash sflash_io2   digital_io[31]
SFlash sflash_io3   digital_io[32]
SSRAM dbg_clk_mon   digital_io[33]
SSRAM uartm rxd   digital_io[34]
SSRAM uartm txd   digital_io[35]
usb1.1 usb_dp   digital_io[36]
usb1.1 usb_dn   digital_io[37]
project layout image
project layout image
Layout Image
Description

Arduino pin compatible Single RISCV 32 Bit core Project

Version

S5

Category

processor

Process

sky130A