+/* CLKCON 0xC6 */
+sfr __at 0xC6 CLKCON; /* Clock Control */
+
+#define CLKCON_OSC32K_RC (1 << 7)
+#define CLKCON_OSC32K_XTAL (0 << 7)
+#define CLKCON_OSC32K_MASK (1 << 7)
+#define CLKCON_OSC_RC (1 << 6)
+#define CLKCON_OSC_XTAL (0 << 6)
+#define CLKCON_OSC_MASK (1 << 6)
+#define CLKCON_TICKSPD_MASK (7 << 3)
+# define CLKCON_TICKSPD_1 (0 << 3)
+# define CLKCON_TICKSPD_1_2 (1 << 3)
+# define CLKCON_TICKSPD_1_4 (2 << 3)
+# define CLKCON_TICKSPD_1_8 (3 << 3)
+# define CLKCON_TICKSPD_1_16 (4 << 3)
+# define CLKCON_TICKSPD_1_32 (5 << 3)
+# define CLKCON_TICKSPD_1_64 (6 << 3)
+# define CLKCON_TICKSPD_1_128 (7 << 3)
+
+#define CLKCON_CLKSPD_MASK (7 << 0)
+# define CLKCON_CLKSPD_1 (0 << 0)
+# define CLKCON_CLKSPD_1_2 (1 << 0)
+# define CLKCON_CLKSPD_1_4 (2 << 0)
+# define CLKCON_CLKSPD_1_8 (3 << 0)
+# define CLKCON_CLKSPD_1_16 (4 << 0)
+# define CLKCON_CLKSPD_1_32 (5 << 0)
+# define CLKCON_CLKSPD_1_64 (6 << 0)
+# define CLKCON_CLKSPD_1_128 (7 << 0)
+