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diff --git a/components/codec-uda1342/uda1342.h b/components/codec-uda1342/uda1342.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !!!Purpose
+///
+/// Definition of methods for UDA1342 driver.
+///
+/// !!!Usage
+///
+/// -# UDA1342_Read
+/// -# UDA1342_Write
+/// -# UDA1342_DAC_Init
+//------------------------------------------------------------------------------
+
+#ifndef UDA1342_H
+#define UDA1342_H
+
+#include <board.h>
+#include <twi/twid.h>
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+// Master Clock Selector
+#define UDA1342_MCK_SEL_256_FS 0
+#define UDA1342_MCK_SEL_384_FS 1
+
+//------------------------------------------------------------------------------
+//         Register definition
+//------------------------------------------------------------------------------
+
+// DAC user interface register addresses
+
+/// \internal UDA1342 system register address
+#define UDA1342_REG_SYSTEM              0x00
+/// \internal UDA1342 sub system register address
+#define UDA1342_REG_SUB_SYSTEM          0x01
+/// \internal UDA1342 DAC feature register address
+#define UDA1342_REG_DAC_FEATURE         0x10
+/// \internal UDA1342 DAC master volume register address
+#define UDA1342_REG_DAC_MASTER_VOLUME   0x11
+/// \internal UDA1342 DAC mixer volume register address
+#define UDA1342_REG_DAC_MIXER_VOLUME    0x12
+/// \internal UDA1342 DAC ADC input and mixer gain channel 1 register address
+#define UDA1342_REG_GAIN_CH1            0x20
+/// \internal UDA1342 DAC ADC input and mixer gain channel 2 register address
+#define UDA1342_REG_GAIN_CH2            0x21
+/// \internal UDA1342 DAC evaluation register address
+#define UDA1342_REG_EVALUATION          0x30
+
+// Register field values
+// REG_SYSTEM
+#define UDA1342_BIT_SYSTEM_RST  (1 << 15)
+#define UDA1342_BIT_SYSTEM_QS   (1 << 14)
+#define UDA1342_BIT_SYSTEM_MDC  (1 << 13)
+#define UDA1342_BIT_SYSTEM_DC   (1 << 12)
+#define UDA1342_BIT_SYSTEM_AM2  (1 << 11)
+#define UDA1342_BIT_SYSTEM_AM1  (1 << 10)
+#define UDA1342_BIT_SYSTEM_AM0  (1 << 9)
+#define UDA1342_BIT_SYSTEM_PAD  (1 << 8)
+#define UDA1342_BIT_SYSTEM_SC1  (1 << 6)
+#define UDA1342_BIT_SYSTEM_SC0  (1 << 5)
+#define UDA1342_BIT_SYSTEM_IF2  (1 << 4)
+#define UDA1342_BIT_SYSTEM_IF1  (1 << 3)
+#define UDA1342_BIT_SYSTEM_IF0  (1 << 2)
+#define UDA1342_BIT_SYSTEM_DP   (1 << 1)
+#define UDA1342_BIT_SYSTEM_PDA  (1 << 0)
+
+#define UDA1342_BIT_DAC_FEATURE_DM  (1 << 5)
+
+/*
+RST FUNCTION
+0 no reset
+1 reset registers to default
+
+SC1 SC0 FUNCTION
+0 0 256fs
+0 1 384fs
+1 0 512fs
+1 1 768fs
+
+IF2 IF1 IF0 FUNCTION
+
+0 0 0 I S-bus
+0 0 1 LSB-justified16 bits
+0 1 0 LSB-justified 20 bits
+0 1 1 LSB-justified 24 bits
+1 0 0 MSB-justified
+1 0 1 LSB-justified 16 bits input and MSB-justified output
+1 1 0 LSB-justified 20 bits input and MSB-justified output
+1 1 1 LSB-justified 24 bits input and MSB-justified output
+
+MT/MTA/MTB FUNCTION (mute)
+0 no muting
+1 muting
+
+QM FUNCTION (quick mute mode)
+0 soft mute mode
+1 quick mute mode
+*/
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+
+extern unsigned short UDA1342_Read(
+    Twid *pTwid,
+    unsigned char device,
+    unsigned char regAddr);
+
+extern void UDA1342_Write(
+    Twid *pTwid,
+    unsigned char device,
+    unsigned char regAddr,
+    unsigned short data);
+
+extern unsigned char UDA1342_DAC_Init(
+    Twid *pTwid, 
+    unsigned int device,
+    unsigned char isClock384);
+
+void UDA1342_DisplayRegisters(
+    Twid *pTwid, 
+    unsigned int device);
+
+#endif // UDA1342_H
+