Add more information to NAND driver documentation

Documentation/Doxygen/src/introduction.txt

@@ -582,6 +582,17 @@ int main (void) {
 \page driver_NAND NAND
 
 This is a CMSIS compliant driver for NAND Flash devices that are connected to the microcontroller's memory bus.
+It exports a NAND CMSIS-Driver with a maximum of four memory mapped NAND Flash devices.
+
+The driver is configured using the NAND_MemBus_Config.h configuration file, which contains the following options:
+- \c \#define \c NAND_DRIVER exports the NAND CMSIS-Driver instance, which can be used to access the memory mapped NAND Flash devices.
+- \c \#define \c NAND_DEVx enables the memory mapped NAND Flash device.
+- \c \#define \c NAND_DEVx_ADDR_BASE specifies the base address of the Flash device, which is used to control the data/address lines and nCE, nRE, nWE lines.
+- \c \#define \c NAND_DEVx_ADDR_ALE specifies the ALE address of the Flash device, which is used to control the ALE line.
+- \c \#define \c NAND_DEVx_ADDR_CLE specifies the CLE address of the Flash device, which is used to control the CLE line.
+- \c \#define \c NAND_DEVx_DATA_WIDTH specifies the data bus width of the Flash device.
+- \c \#define \c NAND_DEVx_RB_PIN specifies if Ready/Busy line of the Flash device is available (used for Ready/Busy monitoring).
+- \c \#define \c NAND_DEVx_RB_PIN_IRQ specifies if Ready/Busy line of the Flash device can trigger an interrupt.
 */