diff --git a/README.md b/README.md
index 3706438..511af84 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,12 @@
 | :exclamation: Important Note            |
 |-----------------------------------------|
 
-## Please fill in your project documentation in this README.md file 
+## Additional memory (internal 1kB of OpenRAM and HyperRAM driver for external memory chip) connected through Wishbone to Caravel SoC for MPW submission
 
+| Memory block  | Space| Address | Size |
+| --- | --- | --- | --- |
+| HyperRAM ext. chip  | RAM  | 0x3000_0000 - 0x307f_ffff | 8MB |
+| HyperRAM ext. chip  | Registers  | 0x3080_0000 - 0x3080_ffff | max 64k registers, 16bit each |
+| HyperRAM driver  | CSRs  | 0x3081_0000 - 0x3081_ffff | max 64kB, 16k CSRs |
+| OpenRAM  | RAM  | 0x30c0_0000 - 0x30c0_ffff | max 64kB |
 
-Refer to [README](docs/source/index.rst) for this sample project documentation.