diff --git a/arch/arm/src/s32k1xx/Kconfig b/arch/arm/src/s32k1xx/Kconfig
index 07960046808..97d8741d3af 100644
--- a/arch/arm/src/s32k1xx/Kconfig
+++ b/arch/arm/src/s32k1xx/Kconfig
@@ -245,30 +245,51 @@ comment "CAREFUL: Bad selections may lock up your board"
 config S32K1XX_FLASHCFG_BACKDOOR1
 	hex "Backdoor comparison key 1"
 	default 0xffffffff
+	---help---
+		Refer to the S32K1xx reference manual for a description of the
+		backdoor key.
 
 config S32K1XX_FLASHCFG_BACKDOOR2
 	hex "Backdoor comparison key 2"
 	default 0xffffffff
+	---help---
+		Refer to the S32K1xx reference manual for a description of the
+		backdoor key.
 
 config S32K1XX_FLASHCFG_FPROT
 	hex "Program flash protection bytes"
 	default 0xffffffff
+	---help---
+		Refer to the S32K1xx reference manual or to hardware/s32k1xx_flashcfg.h
+		for a description of the FPROT bitfields.
 
 config S32K1XX_FLASHCFG_FSEC
 	hex "Flash security byte"
 	default 0xff
+	---help---
+		Refer to the S32K1xx reference manual or to hardware/s32k1xx_flashcfg.h
+		for a description of the FSEC bitfields.
 
 config S32K1XX_FLASHCFG_FOPT
 	hex "Flash nonvolatile option byte"
 	default 0xff
+	---help---
+		Refer to the S32K1xx reference manual or to hardware/s32k1xx_flashcfg.h
+		for a description of the FOPT bitfields.
 
 config S32K1XX_FLASHCFG_FEPROT
 	hex "EEPROM protection byte"
 	default 0xff
+	---help---
+		Refer to the S32K1xx reference manual or to hardware/s32k1xx_flashcfg.h
+		for a description of the FEPROT bitfields.
 
 config S32K1XX_FLASHCFG_FDPROT
 	hex "Data flash protection byte"
 	default 0xff
+	---help---
+		Refer to the S32K1xx reference manual or to hardware/s32k1xx_flashcfg.h
+		for a description of the FDPROT bitfields.
 
 endmenu # S32K1xx FLASH Configuration