diff --git a/include/configs/MPC8315ERDB.h b/include/configs/MPC8315ERDB.h
index 1225270..add65f0 100644
--- a/include/configs/MPC8315ERDB.h
+++ b/include/configs/MPC8315ERDB.h
@@ -118,23 +118,23 @@
 				| ( 8 << TIMING_CFG0_ODT_PD_EXIT_SHIFT ) \
 				| ( 2 << TIMING_CFG0_MRS_CYC_SHIFT ) )
 				/* 0x00220802 */
-#define CONFIG_SYS_DDR_TIMING_1	( ( 3 << TIMING_CFG1_PRETOACT_SHIFT ) \
-				| ( 9 << TIMING_CFG1_ACTTOPRE_SHIFT ) \
-				| ( 3 << TIMING_CFG1_ACTTORW_SHIFT ) \
+#define CONFIG_SYS_DDR_TIMING_1	( ( 2 << TIMING_CFG1_PRETOACT_SHIFT ) \
+				| ( 7 << TIMING_CFG1_ACTTOPRE_SHIFT ) \
+				| ( 2 << TIMING_CFG1_ACTTORW_SHIFT ) \
 				| ( 5 << TIMING_CFG1_CASLAT_SHIFT ) \
 				| ( 6 << TIMING_CFG1_REFREC_SHIFT ) \
 				| ( 2 << TIMING_CFG1_WRREC_SHIFT ) \
 				| ( 2 << TIMING_CFG1_ACTTOACT_SHIFT ) \
 				| ( 2 << TIMING_CFG1_WRTORD_SHIFT ) )
-				/* 0x39356222 */
+				/* 0x27256222 */
 #define CONFIG_SYS_DDR_TIMING_2	( ( 1 << TIMING_CFG2_ADD_LAT_SHIFT ) \
 				| ( 4 << TIMING_CFG2_CPO_SHIFT ) \
 				| ( 2 << TIMING_CFG2_WR_LAT_DELAY_SHIFT ) \
 				| ( 2 << TIMING_CFG2_RD_TO_PRE_SHIFT ) \
 				| ( 2 << TIMING_CFG2_WR_DATA_DELAY_SHIFT ) \
 				| ( 3 << TIMING_CFG2_CKE_PLS_SHIFT ) \
-				| ( 7 << TIMING_CFG2_FOUR_ACT_SHIFT) )
-				/* 0x121048c7 */
+				| ( 5 << TIMING_CFG2_FOUR_ACT_SHIFT) )
+				/* 0x121048c5 */
 #define CONFIG_SYS_DDR_INTERVAL	( ( 0x0360 << SDRAM_INTERVAL_REFINT_SHIFT ) \
 				| ( 0x0100 << SDRAM_INTERVAL_BSTOPRE_SHIFT ) )
 				/* 0x03600100 */
diff --git a/include/mpc83xx.h b/include/mpc83xx.h
index a2c0ed9..43553f5 100644
--- a/include/mpc83xx.h
+++ b/include/mpc83xx.h
@@ -887,7 +887,9 @@
 #define TIMING_CFG1_WRTORD_SHIFT	0
 #define TIMING_CFG1_CASLAT_20		0x00030000	/* CAS latency = 2.0 */
 #define TIMING_CFG1_CASLAT_25		0x00040000	/* CAS latency = 2.5 */
-#define TIMING_CFG1_CASLAT_30		0x00050000	/* CAS latency = 2.5 */
+#define TIMING_CFG1_CASLAT_30		0x00050000	/* CAS latency = 3.0 */
+#define TIMING_CFG1_CASLAT_35		0x00060000	/* CAS latency = 3.5 */
+#define TIMING_CFG1_CASLAT_40		0x00070000	/* CAS latency = 4.0 */
 
 /* TIMING_CFG_2 - DDR SDRAM Timing Configuration 2
  */