diff --git a/src/ds323x/configuration.rs b/src/ds323x/configuration.rs
index eb955f7..3951195 100644
--- a/src/ds323x/configuration.rs
+++ b/src/ds323x/configuration.rs
@@ -64,6 +64,19 @@ where
         let offset = self.iface.read_register(Register::AGING_OFFSET)?;
         Ok(offset as i8)
     }
+
+    /// Set the interrupt/square-wave output to be used as interrupt output.
+    pub fn use_int_sqw_output_as_interrupt(&mut self) -> Result<(), Error<E>> {
+        let control = self.control;
+        self.write_control(control | BitFlags::INTCN)
+    }
+
+    /// Set the interrupt/square-wave output to be used as square-wave output.
+    pub fn use_int_sqw_output_as_square_wave(&mut self) -> Result<(), Error<E>> {
+        let control = self.control;
+        self.write_control(control & !BitFlags::INTCN)
+    }
+
     fn write_control(&mut self, control: u8) -> Result<(), Error<E>> {
         self.iface.write_register(Register::CONTROL, control)?;
         self.control = control;
diff --git a/src/lib.rs b/src/lib.rs
index a4878e0..fcf77fa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -357,6 +357,7 @@ impl BitFlags {
     const CENTURY    : u8 = 0b1000_0000;
     const EOSC       : u8 = 0b1000_0000;
     const TEMP_CONV  : u8 = 0b0010_0000;
+    const INTCN      : u8 = 0b0000_0100;
     const BUSY       : u8 = 0b0000_0100;
     const EN32KHZ    : u8 = 0b0000_1000;
     const OSC_STOP   : u8 = 0b1000_0000;
diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index cac730a..199fa30 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -30,6 +30,7 @@ pub struct BitFlags;
 impl BitFlags {
     pub const EOSC       : u8 = 0b1000_0000;
     pub const TEMP_CONV  : u8 = 0b0010_0000;
+    pub const INTCN      : u8 = 0b0000_0100;
     pub const BUSY       : u8 = 0b0000_0100;
     pub const EN32KHZ    : u8 = 0b0000_1000;
     pub const OSC_STOP   : u8 = 0b1000_0000;
diff --git a/tests/configuration.rs b/tests/configuration.rs
index dacc521..04cd333 100644
--- a/tests/configuration.rs
+++ b/tests/configuration.rs
@@ -59,3 +59,6 @@ set_param_test!(set_aging_offset_max, set_aging_offset, AGING_OFFSET,  127, 127)
 get_param_test!(get_aging_offset_min, get_aging_offset, AGING_OFFSET, -128, 0b1000_0000);
 get_param_test!(get_aging_offset_max, get_aging_offset, AGING_OFFSET,  127, 127);
 
+call_method_test!(int_sqw_out_int, use_int_sqw_output_as_interrupt,   CONTROL, CONTROL_POR_VALUE |  BF::INTCN);
+call_method_test!(int_sqw_out_sqw, use_int_sqw_output_as_square_wave, CONTROL, CONTROL_POR_VALUE & !BF::INTCN);
+