diff --git a/arch/z16/src/common/up_blocktask.c b/arch/z16/src/common/up_blocktask.c
index dd8ea8ef173..584aec0ea83 100644
--- a/arch/z16/src/common/up_blocktask.c
+++ b/arch/z16/src/common/up_blocktask.c
@@ -83,7 +83,7 @@ void up_block_task(FAR struct tcb_s *tcb, tstate_t task_state)
   ASSERT((tcb->task_state >= FIRST_READY_TO_RUN_STATE) &&
          (tcb->task_state <= LAST_READY_TO_RUN_STATE));
 
-  /* err("Blocking TCB=%p\n", tcb); */
+  /* sinfo("Blocking TCB=%p\n", tcb); */
 
   /* Remove the tcb task from the ready-to-run list.  If we
    * are blocking the task at the head of the task list (the
diff --git a/arch/z16/src/common/up_exit.c b/arch/z16/src/common/up_exit.c
index ba2aefb418b..df4d62c3818 100644
--- a/arch/z16/src/common/up_exit.c
+++ b/arch/z16/src/common/up_exit.c
@@ -78,8 +78,8 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
   int i;
 #endif
 
-  llerr("  TCB=%p name=%s\n", tcb, tcb->argv[0]);
-  llerr("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
+  sllinfo("  TCB=%p name=%s\n", tcb, tcb->argv[0]);
+  sllinfo("    priority=%d state=%d\n", tcb->sched_priority, tcb->task_state);
 
 #if CONFIG_NFILE_DESCRIPTORS > 0
   filelist = tcb->group->tg_filelist;
@@ -88,8 +88,8 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
       struct inode *inode = filelist->fl_files[i].f_inode;
       if (inode)
         {
-          llerr("      fd=%d refcount=%d\n",
-                i, inode->i_crefs);
+          sllinfo("      fd=%d refcount=%d\n",
+                  i, inode->i_crefs);
         }
     }
 #endif
@@ -102,11 +102,11 @@ static void _up_dumponexit(FAR struct tcb_s *tcb, FAR void *arg)
       if (filep->fs_fd >= 0)
         {
 #if CONFIG_STDIO_BUFFER_SIZE > 0
-          llerr("      fd=%d nbytes=%d\n",
-                filep->fs_fd,
-                filep->fs_bufpos - filep->fs_bufstart);
+          sllinfo("      fd=%d nbytes=%d\n",
+                  filep->fs_fd,
+                  filep->fs_bufpos - filep->fs_bufstart);
 #else
-          llerr("      fd=%d\n", filep->fs_fd);
+          sllinfo("      fd=%d\n", filep->fs_fd);
 #endif
         }
     }
@@ -139,10 +139,10 @@ void _exit(int status)
 
   (void)up_irq_save();
 
-  sllerr("TCB=%p exiting\n", tcb);
+  sllinfo("TCB=%p exiting\n", tcb);
 
 #if defined(CONFIG_DUMP_ON_EXIT) && defined(CONFIG_DEBUG_FEATURES)
-  llerr("Other tasks:\n");
+  sllinfo("Other tasks:\n");
   sched_foreach(_up_dumponexit, NULL);
 #endif
 
@@ -155,7 +155,7 @@ void _exit(int status)
    */
 
   tcb = this_task();
-  sllerr("New Active Task TCB=%p\n", tcb);
+  sllinfo("New Active Task TCB=%p\n", tcb);
 
   /* Then switch contexts */
 
diff --git a/arch/z16/src/common/up_initialize.c b/arch/z16/src/common/up_initialize.c
index 6251b2a41f6..a832942f194 100644
--- a/arch/z16/src/common/up_initialize.c
+++ b/arch/z16/src/common/up_initialize.c
@@ -87,13 +87,13 @@ static void up_calibratedelay(void)
 {
   int i;
 
-  llerr("Beginning 100s delay\n");
+  llwarn("Beginning 100s delay\n");
   for (i = 0; i < 100; i++)
     {
       up_mdelay(1000);
     }
 
-  llerr("End 100s delay\n");
+  llwarn("End 100s delay\n");
 }
 #else
 # define up_calibratedelay()
diff --git a/arch/z16/src/common/up_registerdump.c b/arch/z16/src/common/up_registerdump.c
index fd79284b831..0604e0f7d48 100644
--- a/arch/z16/src/common/up_registerdump.c
+++ b/arch/z16/src/common/up_registerdump.c
@@ -64,14 +64,6 @@
 
 #ifdef CONFIG_ARCH_STACKDUMP
 
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -82,16 +74,19 @@
 
 static void up_registerdump(void)
 {
+#ifdef CONFIG_DEBUG_INFO
   FAR uint32_t *regs32 = (FAR uint32_t*)g_current_regs;
-  llerr("R0 :%08x R1 :%08x R2 :%08x R3 :%08x "
-        "R4 :%08x R5 :%08x R6 :%08x R7 :%08x\n"
-        regs32[REG_R0/2],  regs32[REG_R1/2], regs32[REG_R2/2], regs32[REG_R3/2],
-        regs32[REG_R4/2],  regs32[REG_R5/2], regs32[REG_R6/2], regs32[REG_R7/2]);
-  llerr("R8 :%08x R9 :%08x R10:%08x R11:%08x R12:%08x R13:%08x\n"
-        regs32[REG_R8/2],  regs32[REG_R9/2], regs32[REG_R10/2], regs3[REG_R11/2],
-        regs32[REG_R12/2], regs32[REG_R13/2]);
-  llerr("FP :%08x SP :%08x FLG:%04x\n"
-        regs32[REG_R14/2], regs32[REG_R15/2], g_current_regs[REG_FLAGS]);
+
+  llinfo("R0 :%08x R1 :%08x R2 :%08x R3 :%08x "
+         "R4 :%08x R5 :%08x R6 :%08x R7 :%08x\n"
+         regs32[REG_R0/2],  regs32[REG_R1/2], regs32[REG_R2/2], regs32[REG_R3/2],
+         regs32[REG_R4/2],  regs32[REG_R5/2], regs32[REG_R6/2], regs32[REG_R7/2]);
+  llinfo("R8 :%08x R9 :%08x R10:%08x R11:%08x R12:%08x R13:%08x\n"
+         regs32[REG_R8/2],  regs32[REG_R9/2], regs32[REG_R10/2], regs3[REG_R11/2],
+         regs32[REG_R12/2], regs32[REG_R13/2]);
+  llinfo("FP :%08x SP :%08x FLG:%04x\n"
+         regs32[REG_R14/2], regs32[REG_R15/2], g_current_regs[REG_FLAGS]);
+#endif
 }
 
 #endif /* CONFIG_ARCH_STACKDUMP */
diff --git a/arch/z16/src/common/up_releasepending.c b/arch/z16/src/common/up_releasepending.c
index 90cae6fbb31..ff6d24f4fb0 100644
--- a/arch/z16/src/common/up_releasepending.c
+++ b/arch/z16/src/common/up_releasepending.c
@@ -68,7 +68,7 @@ void up_release_pending(void)
 {
   FAR struct tcb_s *rtcb = this_task();
 
-  sllerr("From TCB=%p\n", rtcb);
+  sllinfo("From TCB=%p\n", rtcb);
 
   /* Merge the g_pendingtasks list into the ready-to-run task list */
 
diff --git a/arch/z16/src/common/up_reprioritizertr.c b/arch/z16/src/common/up_reprioritizertr.c
index 0083f855bdc..8af6cc003b9 100644
--- a/arch/z16/src/common/up_reprioritizertr.c
+++ b/arch/z16/src/common/up_reprioritizertr.c
@@ -96,7 +96,7 @@ void up_reprioritize_rtr(FAR struct tcb_s *tcb, uint8_t priority)
       FAR struct tcb_s *rtcb = this_task();
       bool switch_needed;
 
-      sllerr("TCB=%p PRI=%d\n", tcb, priority);
+      sllinfo("TCB=%p PRI=%d\n", tcb, priority);
 
       /* Remove the tcb task from the ready-to-run list.
        * sched_removereadytorun will return true if we just
diff --git a/arch/z16/src/common/up_schedulesigaction.c b/arch/z16/src/common/up_schedulesigaction.c
index 090c641f601..557dcdf5f47 100644
--- a/arch/z16/src/common/up_schedulesigaction.c
+++ b/arch/z16/src/common/up_schedulesigaction.c
@@ -92,7 +92,7 @@ void up_schedule_sigaction(FAR struct tcb_s *tcb, sig_deliver_t sigdeliver)
 {
   irqstate_t flags;
 
-  err("tcb=0x%p sigdeliver=0x%06x\n", tcb, (uint32_t)sigdeliver);
+  sinfo("tcb=0x%p sigdeliver=0x%06x\n", tcb, (uint32_t)sigdeliver);
 
   /* Make sure that interrupts are disabled */
 
@@ -106,7 +106,7 @@ void up_schedule_sigaction(FAR struct tcb_s *tcb, sig_deliver_t sigdeliver)
        * being delivered to the currently executing task.
        */
 
-      err("rtcb=0x%p g_current_regs=0x%p\n", this_task(), g_current_regs);
+      sinfo("rtcb=0x%p g_current_regs=0x%p\n", this_task(), g_current_regs);
 
       if (tcb == this_task())
         {
diff --git a/arch/z16/src/common/up_sigdeliver.c b/arch/z16/src/common/up_sigdeliver.c
index cbe9e95ca61..7860f1d1de4 100644
--- a/arch/z16/src/common/up_sigdeliver.c
+++ b/arch/z16/src/common/up_sigdeliver.c
@@ -84,7 +84,7 @@ void up_sigdeliver(void)
 
   board_autoled_on(LED_SIGNAL);
 
-  serr("rtcb=%p sigdeliver=%p sigpendactionq.head=%p\n",
+  sinfo("rtcb=%p sigdeliver=%p sigpendactionq.head=%p\n",
         rtcb, rtcb->xcp.sigdeliver, rtcb->sigpendactionq.head);
   ASSERT(rtcb->xcp.sigdeliver != NULL);
 
@@ -119,7 +119,7 @@ void up_sigdeliver(void)
    * errno that is needed by the user logic (it is probably EINTR).
    */
 
-  serr("Resuming\n");
+  sinfo("Resuming\n");
   (void)up_irq_save();
   rtcb->pterrno = saved_errno;
 
diff --git a/arch/z16/src/common/up_stackdump.c b/arch/z16/src/common/up_stackdump.c
index 14123807ff9..9ae0cb71e40 100644
--- a/arch/z16/src/common/up_stackdump.c
+++ b/arch/z16/src/common/up_stackdump.c
@@ -78,9 +78,9 @@ static void up_stackdump(void)
   chipreg_t stack_base = (chipreg_t)rtcb->adj_stack_ptr;
   chipreg_t stack_size = (chipreg_t)rtcb->adj_stack_size;
 
-  llerr("stack_base: %08x\n", stack_base);
-  llerr("stack_size: %08x\n", stack_size);
-  llerr("sp:         %08x\n", sp);
+  llinfo("stack_base: %08x\n", stack_base);
+  llinfo("stack_size: %08x\n", stack_size);
+  llinfo("sp:         %08x\n", sp);
 
   if (sp >= stack_base || sp < stack_base - stack_size)
     {
@@ -94,7 +94,7 @@ static void up_stackdump(void)
       for (stack = sp & ~0x0f; stack < stack_base; stack += 8*sizeof(chipreg_t))
         {
           chipreg_t *ptr = (chipreg_t*)stack;
-          llerr("%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
+          llinfo("%08x: %08x %08x %08x %08x %08x %08x %08x %08x\n",
                  stack, ptr[0], ptr[1], ptr[2], ptr[3],
                  ptr[4], ptr[5], ptr[6], ptr[7]);
         }
diff --git a/arch/z16/src/common/up_unblocktask.c b/arch/z16/src/common/up_unblocktask.c
index 26aac846750..8fe8beccfa8 100644
--- a/arch/z16/src/common/up_unblocktask.c
+++ b/arch/z16/src/common/up_unblocktask.c
@@ -79,7 +79,7 @@ void up_unblock_task(FAR struct tcb_s *tcb)
   ASSERT((tcb->task_state >= FIRST_BLOCKED_STATE) &&
          (tcb->task_state <= LAST_BLOCKED_STATE));
 
-  /* err("Unblocking TCB=%p\n", tcb); */
+  /* sinfo("Unblocking TCB=%p\n", tcb); */
 
   /* Remove the task from the blocked task list */
 
diff --git a/arch/z16/src/z16f/z16f_espi.c b/arch/z16/src/z16f/z16f_espi.c
index 6cf1ce07c6f..354974e5807 100644
--- a/arch/z16/src/z16f/z16f_espi.c
+++ b/arch/z16/src/z16f/z16f_espi.c
@@ -221,7 +221,7 @@ static bool spi_checkreg(FAR struct z16f_spi_s *priv, bool wr, uint16_t regval,
         {
           /* Yes... show how many times we did it */
 
-          llerr("...[Repeats %d times]...\n", priv->ntimes);
+          syslog(LOG_INFO, "...[Repeats %d times]...\n", priv->ntimes);
         }
 
       /* Save information about the new access */
@@ -253,7 +253,7 @@ static uint8_t spi_getreg8(FAR struct z16f_spi_s *priv, uintptr_t regaddr)
 
   if (spi_checkreg(priv, false, (uint16_t)regval, regaddr))
     {
-      llerr("%06x->%02x\n", regaddr, regval);
+      syslog(LOG_INFO, "%06x->%02x\n", regaddr, regval);
     }
 
   return regval;
@@ -274,7 +274,7 @@ static void spi_putreg8(FAR struct z16f_spi_s *priv, uint8_t regval,
 {
   if (spi_checkreg(priv, true, (uint16_t)regval, regaddr))
     {
-      llerr("%06x<-%02x\n", regaddr, regval);
+      syslog(LOG_INFO, "%06x<-%02x\n", regaddr, regval);
     }
 
   putreg8(regval, regaddr);
@@ -295,7 +295,7 @@ static void spi_putreg16(FAR struct z16f_spi_s *priv, uint16_t regval,
 {
   if (spi_checkreg(priv, true, regval, regaddr))
     {
-      llerr("%06x<-%04x\n", regaddr, regval);
+      syslog(LOG_INFO, "%06x<-%04x\n", regaddr, regval);
     }
 
   putreg8(regval, regaddr);
@@ -466,7 +466,7 @@ static uint32_t spi_setfrequency(FAR struct spi_dev_s *dev, uint32_t frequency)
   priv->frequency = frequency;
   priv->actual    = actual;
 
-  spierr("Frequency %d->%d\n", frequency, actual);
+  spiinfo("Frequency %d->%d\n", frequency, actual);
   return actual;
 }