diff --git a/os/hal/hal.dox b/os/hal/hal.dox
index 619d29796..5a6cbb7cc 100644
--- a/os/hal/hal.dox
+++ b/os/hal/hal.dox
@@ -237,45 +237,51 @@
   digraph example {
     size="5, 7";
     rankdir="LR";
-    node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true", width="0.8", height="0.8"];
+    node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
     edge [fontname=Helvetica, fontsize=8];
-    uninit [label="SPI_UNINIT", style="bold"];
     stop  [label="SPI_STOP\nLow Power"];
+    uninit [label="SPI_UNINIT", style="bold"];
     ready [label="SPI_READY\nClock Enabled"];
+    selected [label="SPI_SELECTED\nSlave Selected"];
     active [label="SPI_ACTIVE\nBus Active"];
-    uninit -> stop [label="spiInit()"];
+    sync [label="SPI_SYNC\nSynchronization"];
+    uninit -> stop [label="spiInit()", constraint=false];
     stop -> ready [label="spiStart()"];
-    ready -> ready [label="spiStart()"];
-    ready -> ready [label="spiIgnore()"];
+    ready -> ready [label="spiUnselect()\nspiStart()\nspiWait()"];
     ready -> stop [label="spiStop()"];
     stop -> stop [label="spiStop()"];
-    ready -> active [label="spiSelect()"];
-    active -> active [label="spiSelect()"];
-    active -> ready [label="spiUnselect()"];
-    ready -> ready [label="spiUnselect()"];
-    active -> active [label="spiIgnore()\nspiExchange()\nspiSend()\nspiReceive()"];
+    ready -> selected [label="spiSelect()"];
+    selected -> selected [label="spiSelect()\nspiWait()"];
+    selected -> ready [label="spiUnselect()"];
+    selected -> active [label="spiIgnore()\nspiExchange()\nspiSend()\nspiReceive()"];
+    active -> selected [label="spiWait()\n>spc_endcb<"];
+    ready -> sync [label="spiSynchronize()"];
+    sync -> ready [label="spiWait()\n>spc_endcb<"];
   }
  * @else
  * @dot
   digraph example {
     rankdir="LR";
-    node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true", width="0.8", height="0.8"];
+    node [shape=circle, fontname=Helvetica, fontsize=8, fixedsize="true", width="0.9", height="0.9"];
     edge [fontname=Helvetica, fontsize=8];
-    uninit [label="SPI_UNINIT", style="bold"];
     stop  [label="SPI_STOP\nLow Power"];
+    uninit [label="SPI_UNINIT", style="bold"];
     ready [label="SPI_READY\nClock Enabled"];
+    selected [label="SPI_SELECTED\nSlave Selected"];
     active [label="SPI_ACTIVE\nBus Active"];
-    uninit -> stop [label="spiInit()"];
+    sync [label="SPI_SYNC\nSynchronization"];
+    uninit -> stop [label="spiInit()", constraint=false];
     stop -> ready [label="spiStart()"];
-    ready -> ready [label="spiStart()"];
-    ready -> ready [label="spiIgnore()"];
+    ready -> ready [label="spiUnselect()\nspiStart()\nspiWait()"];
     ready -> stop [label="spiStop()"];
     stop -> stop [label="spiStop()"];
-    ready -> active [label="spiSelect()"];
-    active -> active [label="spiSelect()"];
-    active -> ready [label="spiUnselect()"];
-    ready -> ready [label="spiUnselect()"];
-    active -> active [label="spiIgnore()\nspiExchange()\nspiSend()\nspiReceive()"];
+    ready -> selected [label="spiSelect()"];
+    selected -> selected [label="spiSelect()\nspiWait()"];
+    selected -> ready [label="spiUnselect()"];
+    selected -> active [label="spiIgnore()\nspiExchange()\nspiSend()\nspiReceive()"];
+    active -> selected [label="spiWait()\n>spc_endcb<"];
+    ready -> sync [label="spiSynchronize()"];
+    sync -> ready [label="spiWait()\n>spc_endcb<"];
   }
  * @enddot
  * @endif