diff --git a/boards/stm32f746g-disco/Makefile.include b/boards/stm32f746g-disco/Makefile.include
index 75ad7ead50..fc92aa439f 100644
--- a/boards/stm32f746g-disco/Makefile.include
+++ b/boards/stm32f746g-disco/Makefile.include
@@ -14,5 +14,6 @@ PROGRAMMERS_SUPPORTED += openocd
 # use connect_assert_srst to always be able to flash or reset the board.
 OPENOCD_RESET_USE_CONNECT_ASSERT_SRST ?= 1
 
+# heap configuration
 FMC_RAM_ADDR=0xc0000000
 FMC_RAM_LEN=8192K
diff --git a/boards/stm32f746g-disco/doc.txt b/boards/stm32f746g-disco/doc.txt
index edbccc71d6..2db0cf4358 100644
--- a/boards/stm32f746g-disco/doc.txt
+++ b/boards/stm32f746g-disco/doc.txt
@@ -31,7 +31,7 @@ Current hardware support:
 | Capacitive touch screen | X | |
 | User microphones | - | |
 | External Quad-SPI Flash | - | |
-| External SDRAM | - | |
+| External SDRAM | X | |
 
 ## Flashing the device
 
diff --git a/boards/stm32f746g-disco/include/periph_conf.h b/boards/stm32f746g-disco/include/periph_conf.h
index 3a4aa377d6..3660893f5a 100644
--- a/boards/stm32f746g-disco/include/periph_conf.h
+++ b/boards/stm32f746g-disco/include/periph_conf.h
@@ -396,7 +396,7 @@ static const fmc_bank_conf_t fmc_bank_config[] = {
         .bank = FMC_BANK_5,
         .mem_type = FMC_SDRAM,
         .data_width = FMC_BUS_WIDTH_16BIT,
-        .address = 0xc0000000,               /* Bank 6 is mapped to 0xd0000000 */
+        .address = 0xc0000000,               /* Bank 5 is mapped to 0xc0000000 */
         .size = MiB(8),                      /* Size in MByte, 4M x 16 Bit */
         .sdram = {
             .clk_period = 2,                 /* SDCLK = 2 x HCLK */