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foss-eda-tools / third_party / shuttle / sky130 / mpw-001 / slot-006 / f052d23da08c006197a7737f9c35d6dfc0227427
commitf052d23da08c006197a7737f9c35d6dfc0227427[log] [tgz]
authorTim Edwards <tim@opencircuitdesign.com>Mon Oct 19 15:13:44 2020 -0400
committerTim Edwards <tim@opencircuitdesign.com>Mon Oct 19 15:13:44 2020 -0400
treed5ec6eac3d7e539cedb77ef6322ba3b87041ed7c
parent6a0750aa6c902a28bf4e05e17c5a0777aed19ba5 [diff]
Added colors indicating power supplies on the PCB footprint drawing.
Regenerated the PDF from the xcircuit PostScript source file.
2 files changed
tree: d5ec6eac3d7e539cedb77ef6322ba3b87041ed7c
  1. doc/
  2. mag/
  3. verilog/
  4. LICENSE
  5. README.md
README.md

CIIC Harness

A template SoC for Google SKY130 free shuttles. It is still WIP. The current SoC architecture is given below.

Managment SoC

The managment SoC runs firmware taht can be used to:

  • Configure Mega Project I/O pads
  • Observe and control Mega Project signals (through on-chip logic analyzer probes)
  • Control the Mega Project power supply

The memory map of the management SoC is given below
(NOTE: This needs updating; see the README file for an updated list.)

Mega Project Area

This is the user space. It has limited silicon area (TBD, about 2.8mm x 2.8mm) as well as a fixed number of I/O pads (37) and power pads (10). See the Caravel premliminary datasheet for details. The repository contains a sample mega project that contains a binary 32-bit up counter.

The firmware running on the Management Area SoC, configures the I/O pads used by the counter and uses the logic probes to observe/control the counter. Three firmware examples are provided:

  1. Configure the Mega Project I/O pads as o/p. Observe the counter value in the testbench: IO_Ports Test.
  2. Configure the Mega Project I/O pads as o/p. Use the Chip LA to load the counter and observe the o/p till it reaches 500: LA_Test1.
  3. Configure the Mega Project I/O pads as o/p. Use the Chip LA to control the clock source and reset signals and observe the counter value for five clock cylcles: LA_Test2.