diff --git a/bdk/mem/sdram.h b/bdk/mem/sdram.h
index 902162c..5e885ab 100644
--- a/bdk/mem/sdram.h
+++ b/bdk/mem/sdram.h
@@ -100,9 +100,9 @@ enum sdram_ids_mariko
 	LPDDR4X_HOAG_4GB_HYNIX_H54G46CYRBX267           = 30, // Die-C. (1a-01). 61% lp.
 	LPDDR4X_AULA_4GB_HYNIX_H54G46CYRBX267           = 31, // Die-C. (1a-01). 61% lp.
 
-	LPDDR4X_IOWA_4GB_MICRON_MT53E512M32D1NP_046_WTB = 32, // Die-B. (1a-01). 61% lp.
-	LPDDR4X_HOAG_4GB_MICRON_MT53E512M32D1NP_046_WTB = 33, // Die-B. (1a-01). 61% lp.
-	LPDDR4X_AULA_4GB_MICRON_MT53E512M32D1NP_046_WTB = 34, // Die-B. (1a-01). 61% lp.
+	LPDDR4X_IOWA_4GB_MICRON_MT53E512M32D1NP_046_WTB = 32, // Die-B. (1a-01). D8BQM. 61% lp.
+	LPDDR4X_HOAG_4GB_MICRON_MT53E512M32D1NP_046_WTB = 33, // Die-B. (1a-01). D8BQM. 61% lp.
+	LPDDR4X_AULA_4GB_MICRON_MT53E512M32D1NP_046_WTB = 34, // Die-B. (1a-01). D8BQM. 61% lp.
 };
 
 enum sdram_codes_mariko
diff --git a/bdk/mem/sdram_config.inl b/bdk/mem/sdram_config.inl
index e3025d6..e6d6f0b 100644
--- a/bdk/mem/sdram_config.inl
+++ b/bdk/mem/sdram_config.inl
@@ -434,9 +434,9 @@ static const sdram_params_t210_t _dram_cfg_0_samsung_4gb = {
 	.emc_dll_cfg0                                    = 0x1F13412F,
 	.emc_dll_cfg1                                    = 0x00010014,
 
-	.emc_pmc_scratch1                                = 0x4FAFFFFF,
+	.emc_pmc_scratch1                                = 0x4FAFFFFF, // APBDEV_PMC_IO_DPD3_REQ.
 	.emc_pmc_scratch2                                = 0x7FFFFFFF,
-	.emc_pmc_scratch3                                = 0x4006D70B,
+	.emc_pmc_scratch3                                = 0x4006D70B, // APBDEV_PMC_DDR_CNTRL.
 
 	.emc_pmacro_pad_cfg_ctrl                         = 0x00020000,
 	.emc_pmacro_vttgen_ctrl0                         = 0x00030808,