diff --git a/example-fsm-55/hh.c b/example-fsm-55/hh.c
index 2f57f6d..45e2638 100644
--- a/example-fsm-55/hh.c
+++ b/example-fsm-55/hh.c
@@ -355,8 +355,6 @@ text_display (uint8_t kind)
 }
 
 
-static void setup_scr_sleepdeep (void);
-
 int
 main (int argc, const char *argv[])
 {
@@ -366,7 +364,7 @@ main (int argc, const char *argv[])
   (void)argc;
   (void)argv;
 
-  chopstx_conf_idle (1);
+  chopstx_conf_idle (4);
 
   chopstx_mutex_init (&mtx);
   chopstx_cond_init (&cnd0);
@@ -408,56 +406,8 @@ main (int argc, const char *argv[])
   chopstx_join (button_thd, NULL);
   chopstx_join (led_thd, NULL);
 
-  setup_scr_sleepdeep ();
   for (;;)
     asm volatile ("wfi" : : : "memory");
 
   return 0;
 }
-
-struct SCB
-{
-  volatile uint32_t CPUID;
-  volatile uint32_t ICSR;
-  volatile uint32_t VTOR;
-  volatile uint32_t AIRCR;
-  volatile uint32_t SCR;
-  volatile uint32_t CCR;
-  volatile uint8_t  SHP[12];
-  volatile uint32_t SHCSR;
-  volatile uint32_t CFSR;
-  volatile uint32_t HFSR;
-  volatile uint32_t DFSR;
-  volatile uint32_t MMFAR;
-  volatile uint32_t BFAR;
-  volatile uint32_t AFSR;
-  volatile uint32_t PFR[2];
-  volatile uint32_t DFR;
-  volatile uint32_t ADR;
-  volatile uint32_t MMFR[4];
-  volatile uint32_t ISAR[5];
-};
-
-#define SCS_BASE	(0xE000E000)
-#define SCB_BASE	(SCS_BASE +  0x0D00)
-static struct SCB *const SCB = ((struct SCB *)SCB_BASE);
-
-#define SCB_SCR_SLEEPDEEP (1 << 2)
-
-struct PWR
-{
-  volatile uint32_t CR;
-  volatile uint32_t CSR;
-};
-#define PWR_CR_PDDS 0x0002
-#define PWR_CR_CWUF 0x0004
-
-#define PWR_BASE	(APBPERIPH_BASE + 0x00007000)
-#define PWR		((struct PWR *) PWR_BASE)
-
-static void setup_scr_sleepdeep (void)
-{
-  PWR->CR |= PWR_CR_CWUF;
-  PWR->CR |= PWR_CR_PDDS;
-  SCB->SCR |= SCB_SCR_SLEEPDEEP;
-}