diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
index a64f2df..2b13fd7 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A8.dsc
@@ -105,7 +105,7 @@
 
   ## SP804 Timer
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|1000000
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000        # expressed in 100ns units, 100,000 x 100 ns = 10,000,000 ns = 10 ms
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000        # expressed in 100ns units, 10,000 x 100 ns = 1,000,000 ns = 1 ms
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicInterruptNum|36
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicBase|0x10011000
   gArmPlatformTokenSpaceGuid.PcdSP804TimerMetronomeBase|0x10011020
diff --git a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
index a4bffb3..e5ec8d4 100644
--- a/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
+++ b/ArmPlatformPkg/ArmRealViewEbPkg/ArmRealViewEb-RTSM-A9x2.dsc
@@ -104,7 +104,7 @@
 
   ## SP804 Timer
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|1000000
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000        # expressed in 100ns units, 100,000 x 100 ns = 10,000,000 ns = 10 ms
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000        # expressed in 100ns units, 10,000 x 100 ns = 1,000,000 ns = 1 ms
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicInterruptNum|33
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicBase|0x10011000
   gArmPlatformTokenSpaceGuid.PcdSP804TimerMetronomeBase|0x10011020
diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc
index ad4e7bf..248e54f 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc
+++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-CTA9x4.dsc
@@ -138,7 +138,7 @@
 
   ## SP804 Timer
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|1000000
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000        # expressed in 100ns units, 100,000 x 100 ns = 10,000,000 ns = 10 ms
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000        # expressed in 100ns units, 10,000 x 100 ns = 1,000,000 ns = 1 ms
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicInterruptNum|34
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicBase|0x10011000
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPerformanceBase|0x10011020
diff --git a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A9x4.dsc b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A9x4.dsc
index 14d0cf5..d6870dc 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A9x4.dsc
+++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpress-RTSM-A9x4.dsc
@@ -128,7 +128,7 @@
 
   ## SP804 Timer
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|1000000
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000        # expressed in 100ns units, 100,000 x 100 ns = 10,000,000 ns = 10 ms
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000        # expressed in 100ns units, 10,000 x 100 ns = 1,000,000 ns = 1 ms
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicInterruptNum|34
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPeriodicBase|0x1c110000
   gArmPlatformTokenSpaceGuid.PcdSP804TimerPerformanceBase|0x1c110020
diff --git a/BeagleBoardPkg/BeagleBoardPkg.dsc b/BeagleBoardPkg/BeagleBoardPkg.dsc
index 9eb364e..375f03c 100644
--- a/BeagleBoardPkg/BeagleBoardPkg.dsc
+++ b/BeagleBoardPkg/BeagleBoardPkg.dsc
@@ -341,7 +341,7 @@
   gArmTokenSpaceGuid.PcdCpuVectorBaseAddress|0x80008000
   gArmTokenSpaceGuid.PcdCpuResetAddress|0x80008000
 
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterPeriodInNanoseconds|77
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|13000000
 
diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec
index f557527..9f113fc 100644
--- a/EmbeddedPkg/EmbeddedPkg.dec
+++ b/EmbeddedPkg/EmbeddedPkg.dec
@@ -121,7 +121,7 @@
 
   gEmbeddedTokenSpaceGuid.PcdTimerBaseAddress|0x3c700000|UINT32|0x0000001c
   gEmbeddedTokenSpaceGuid.PcdTimerVector|7|UINT32|0x0000001d
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000|UINT32|0x0000001e
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000|UINT32|0x0000001e
   gEmbeddedTokenSpaceGuid.PcdInterruptBaseAddress|0x38e00000|UINT32|0x0000001f
 
   gEmbeddedTokenSpaceGuid.PcdMetronomeTickPeriod|100|UINT32|0x00000020
diff --git a/EmbeddedPkg/EmbeddedPkg.dsc b/EmbeddedPkg/EmbeddedPkg.dsc
index 6719eea..2005d8f 100644
--- a/EmbeddedPkg/EmbeddedPkg.dsc
+++ b/EmbeddedPkg/EmbeddedPkg.dsc
@@ -219,7 +219,7 @@
 #
   gEmbeddedTokenSpaceGuid.PcdTimerBaseAddress|0x3c700000
   gEmbeddedTokenSpaceGuid.PcdTimerVector|7
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000
 
 [PcdsFixedAtBuild.IPF]
   gEfiMdePkgTokenSpaceGuid.PcdIoBlockBaseAddressForIpf|0x0ffffc000000
diff --git a/Omap35xxPkg/Omap35xxPkg.dsc b/Omap35xxPkg/Omap35xxPkg.dsc
index 8d8f521..cd963f3 100644
--- a/Omap35xxPkg/Omap35xxPkg.dsc
+++ b/Omap35xxPkg/Omap35xxPkg.dsc
@@ -157,7 +157,7 @@
   # Timers
   gOmap35xxTokenSpaceGuid.PcdOmap35xxArchTimer|3
   gOmap35xxTokenSpaceGuid.PcdOmap35xxFreeTimer|4
-  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|100000
+  gEmbeddedTokenSpaceGuid.PcdTimerPeriod|10000
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterPeriodInNanoseconds|77
   gEmbeddedTokenSpaceGuid.PcdEmbeddedPerformanceCounterFrequencyInHz|13000000
 
