basic rom usage info

docs/source/architecture.md

@@ -22,4 +22,14 @@ This page of the documentation explains the architecture of OpenRAM.
     * Write Driver(s)
     * Control Logic with Replica Bitline
 
-![OpenRAM SRAM Architecture](../assets/images/architecture/sram_architecture.png)
+![OpenRAM SRAM Architecture](../assets/images/architecture/sram_architecture.png)
+
+## ROM Architecture
+* Bit-cell Array
+    * 1T NAND Bitcell
+* Row Address Decoder
+* Wordline Driver(s)
+* Column Multiplexer
+* Column Pre-Decoder
+* Bitline Precharge(s)
+* Control Logic

docs/source/basic_rom_usage.md

@@ -0,0 +1,86 @@
+
+### [Go Back](./index.md#table-of-contents)
+
+# Basic Usage
+This page of the documentation explains the basic usage of OpenRAM's ROM compiler (OpenROM).
+
+
+
+## Table of Contents
+1. [Environment Variable Setup](#environment-variable-setup-assuming-bash)
+1. [Command Line Usage](#command-line-usage)
+1. [Script Usage](#script-usage)
+1. [Configuration Files](#configuration-files)
+1. [Common Configuration File Options](#common-configuration-file-options)
+1. [Output Files](#output-files)
+
+
+
+## Environment Variable Setup (assuming bash)
+Environment configuration is the same as described in [basic SRAM usage](./basic_usage#environment-variable-setup-assuming-bash)
+
+
+## Accepted Data formats
+OpenROM currently supports input data formatted as a binary file or a text file
+of hexadecimal-encoded data. For hexadecimal data, the input file must contain
+a single line of hexadecimal text. The data in any input file will be written
+the ROM in the order it appears in the input file, ie. the first bit in the input
+will be written to address 0.
+
+## Command Line Usage
+Once you have defined the environment, you can run OpenROM from the command line
+using a single configuration file written in Python. You can then run OpenROM by
+executing:
+```
+python3 $OPENRAM_HOME/../rom_compiler.py myconfig
+```
+You can see all of the options for the configuration file in
+$OPENRAM\_HOME/options.py
+
+To run macros, it is suggested to use, for example:
+```
+cd OpenRAM/macros/rom_configs
+make sky130_rom_1kbyte
+```
+
+* Common arguments:
+    * `-h` print all arguments
+    * `-t` specify technology (currently only sky130 is supported)
+    * `-v` increase verbosity of output
+    * `-n` don't run DRC/LVS
+    * `-d` don't purge /tmp directory contents
+
+
+## Configuration Files
+* Shares some configuration options with SRAM compiler.
+* Complete configuration options are in `$OPENRAM_HOME/options.py`
+* Some options can be specified on the command line as well
+    * Not recommended for replicating results
+* Example configuration file:
+    ```python
+
+    # Data word size
+    word_size = 2
+
+    # Enable LVS/DRC checking
+    check_lvsdrc = True
+
+    # Path to input data. Either binary file or hex.
+    rom_data = "data_1kbyte.bin"
+    # Format type of input data
+    data_type = "bin"
+
+    # Technology to use in $OPENRAM_TECH, currently only sky130 is supported
+    tech_name = "sky130"
+
+    # Output directory for the results
+    output_path = "temp"
+    # Output file base name
+    output_name = "rom_1kbyte"
+
+    # Only nominal process corner generation is currently supported
+    nominal_corner_only = True
+
+    # Add a supply ring to the generated layout
+    route_supplies = "ring"
+    ```

docs/source/basic_setup.md

@@ -1,7 +1,7 @@
 ### [Go Back](./index.md#table-of-contents)
 
 # Basic Setup
-This page shows the basic setup for using OpenRAM.
+This page shows the basic setup for using OpenRAM to generate an SRAM.
 
 
 

docs/source/basic_usage.md

@@ -1,7 +1,7 @@
 ### [Go Back](./index.md#table-of-contents)
 
 # Basic Usage
-This page of the documentation explains the basic usage of OpenRAM.
+This page of the documentation explains the basic usage of OpenRAM's SRAM compiler.