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foss-eda-tools / third_party / shuttle / sky130 / mpw-001 / slot-015 / 1070832c14176089d6b180922ec44a24f28d00cd
commit1070832c14176089d6b180922ec44a24f28d00cd[log] [tgz]
authorTim Edwards <tim@opencircuitdesign.com>Fri Nov 20 13:55:57 2020 -0500
committerTim Edwards <tim@opencircuitdesign.com>Fri Nov 20 13:55:57 2020 -0500
tree027a7e49b61278abf94dc61664edc39aafa59922
parent4518c6205769f591ea2743b4b175a40e3a684d79 [diff]
Added ngspice netlist and testbenches for the power-on-reset circuit.
5 files changed
tree: 027a7e49b61278abf94dc61664edc39aafa59922
  1. def/
  2. doc/
  3. gds/
  4. lef/
  5. macros/
  6. mag/
  7. ngspice/
  8. openlane/
  9. scripts/
  10. spi/
  11. verilog/
  12. info.yaml
  13. LICENSE
  14. Makefile
  15. 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 that 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 can be found here

Mega Project Area

This is the user space. It has limited silicon area (TBD, about 3.1mm x 3.8mm) 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.