diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6a5f632..ba0e507 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Record of the modification in project development.
 ### Changed
 - [Issue 8 : ADD link to murasaki_samples to README.md](https://github.com/suikan4github/murasaki/issues/8)
 - [Issue 16 : Substitute \n\r by \n ](https://github.com/suikan4github/murasaki/issues/16)
+- [Issue 17 : README.md refinement for DMA Interrupt and required memory](https://github.com/suikan4github/murasaki/issues/17)
 ### Deprecated
 ### Removed
 ### Fixed
diff --git a/README.md b/README.md
index fd64c39..0a68973 100644
--- a/README.md
+++ b/README.md
@@ -147,13 +147,18 @@ The tested target is following :
 
 Pins, clocks, peripherals, and FreeRTOS have to be configured by CubeMX.
 
+The required memory resoucese for the Nucleo F722 demo application (2 tasks, 1 LED,
+  1 UART , 1 I2C and 1 EXTI)
+ * .text(Flash) : 48kB
+ * .bss (RAM) : 16kB
+
 ## Where to get Murasaki
 The Murasaki library can be obtained from [Github project page](https://github.com/suikan4github/murasaki/)
 
 ## Install
 The Murasaki library is an add-on to the STM32 application skeleton generated by CubeMX.
 
-The detail of the install procedure is described in the 
+The detail of the install procedure is described in the
 [doc/refman.pdf](https://github.com/suikan4github/murasaki/blob/master/doc/refman.pdf)
 ## License
 The Murasaki library is distributed under [MIT License](https://github.com/suikan4github/murasaki/blob/master/LICENSE)