diff --git a/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c b/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
index d4188b88f..e6b0d7e61 100644
--- a/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
+++ b/cpu/cc26xx-cc13xx/rf-core/ieee-mode.c
@@ -395,26 +395,33 @@ set_tx_power(radio_value_t power)
   int i;
   rfc_CMD_SET_TX_POWER_t cmd;
 
-  /* Send a CMD_SET_TX_POWER command to the RF */
-  memset(&cmd, 0x00, sizeof(cmd));
-
-  cmd.commandNo = CMD_SET_TX_POWER;
-
+  /* First, find the correct setting and save it */
   for(i = OUTPUT_CONFIG_COUNT - 1; i >= 0; --i) {
     if(power <= output_power[i].dbm) {
-      cmd.txPower.IB = output_power[i].register_ib;
-      cmd.txPower.GC = output_power[i].register_gc;
-      cmd.txPower.tempCoeff = output_power[i].temp_coeff;
-
-      if(rf_core_send_cmd((uint32_t)&cmd, &cmd_status) == RF_CORE_CMD_OK) {
-        /* Success: Remember the new setting */
-        tx_power_current = &output_power[i];
-      } else {
-        PRINTF("set_tx_power: CMDSTA=0x%08lx\n", cmd_status);
-      }
-      return;
+      tx_power_current = &output_power[i];
+      break;
     }
   }
+
+  /*
+   * If the core is not accessible, the new setting will be applied next
+   * time we send CMD_RADIO_SETUP, so we don't need to do anything further.
+   * If the core is accessible, we can apply the new setting immediately with
+   * CMD_SET_TX_POWER
+   */
+  if(rf_core_is_accessible() == RF_CORE_NOT_ACCESSIBLE) {
+    return;
+  }
+
+  memset(&cmd, 0x00, sizeof(cmd));
+  cmd.commandNo = CMD_SET_TX_POWER;
+  cmd.txPower.IB = output_power[i].register_ib;
+  cmd.txPower.GC = output_power[i].register_gc;
+  cmd.txPower.tempCoeff = output_power[i].temp_coeff;
+
+  if(rf_core_send_cmd((uint32_t)&cmd, &cmd_status) == RF_CORE_CMD_ERROR) {
+    PRINTF("set_tx_power: CMDSTA=0x%08lx\n", cmd_status);
+  }
 }
 /*---------------------------------------------------------------------------*/
 static uint8_t
diff --git a/cpu/cc26xx-cc13xx/rf-core/rf-core.c b/cpu/cc26xx-cc13xx/rf-core/rf-core.c
index 3c17085db..236f5813e 100644
--- a/cpu/cc26xx-cc13xx/rf-core/rf-core.c
+++ b/cpu/cc26xx-cc13xx/rf-core/rf-core.c
@@ -122,10 +122,18 @@ rf_core_send_cmd(uint32_t cmd, uint32_t *status)
   bool interrupts_disabled;
   bool is_radio_op = false;
 
-  /* If cmd is 4-byte aligned, then it's a radio OP. Clear the status field */
+  /*
+   * If cmd is 4-byte aligned, then it's either a radio OP or an immediate
+   * command. Clear the status field if it's a radio OP
+   */
   if((cmd & 0x03) == 0) {
-    is_radio_op = true;
-    ((rfc_radioOp_t *)cmd)->status = RF_CORE_RADIO_OP_STATUS_IDLE;
+    uint32_t cmd_type;
+    cmd_type = ((rfc_command_t *)cmd)->commandNo & RF_CORE_COMMAND_TYPE_MASK;
+    if(cmd_type == RF_CORE_COMMAND_TYPE_IEEE_FG_RADIO_OP ||
+       cmd_type == RF_CORE_COMMAND_TYPE_RADIO_OP) {
+      is_radio_op = true;
+      ((rfc_radioOp_t *)cmd)->status = RF_CORE_RADIO_OP_STATUS_IDLE;
+    }
   }
 
   /*
@@ -152,7 +160,7 @@ rf_core_send_cmd(uint32_t cmd, uint32_t *status)
 
   HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDR) = cmd;
   do {
-    *status = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDSTA);
+    *status = HWREG(RFC_DBELL_BASE + RFC_DBELL_O_CMDSTA) & 0xFF;
     if(++timeout_count > 50000) {
       PRINTF("rf_core_send_cmd: 0x%08lx Timeout\n", cmd);
       if(!interrupts_disabled) {
diff --git a/cpu/cc26xx-cc13xx/rf-core/rf-core.h b/cpu/cc26xx-cc13xx/rf-core/rf-core.h
index 7cf0b10e8..42c6edb90 100644
--- a/cpu/cc26xx-cc13xx/rf-core/rf-core.h
+++ b/cpu/cc26xx-cc13xx/rf-core/rf-core.h
@@ -218,7 +218,6 @@ typedef struct rf_core_primary_mode_s {
 /*---------------------------------------------------------------------------*/
 /* Command Types */
 #define RF_CORE_COMMAND_TYPE_MASK                        0x0C00
-#define RF_CORE_COMMAND_TYPE_IMMEDIATE                   0x0000
 #define RF_CORE_COMMAND_TYPE_RADIO_OP                    0x0800
 #define RF_CORE_COMMAND_TYPE_IEEE_BG_RADIO_OP            0x0800
 #define RF_CORE_COMMAND_TYPE_IEEE_FG_RADIO_OP            0x0C00