4 * \brief SAM D20 Clock configuration
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6 * Copyright (C) 2012-2013 Atmel Corporation. All rights reserved.
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12 * Redistribution and use in source and binary forms, with or without
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13 * modification, are permitted provided that the following conditions are met:
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15 * 1. Redistributions of source code must retain the above copyright notice,
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16 * this list of conditions and the following disclaimer.
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18 * 2. Redistributions in binary form must reproduce the above copyright notice,
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19 * this list of conditions and the following disclaimer in the documentation
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20 * and/or other materials provided with the distribution.
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22 * 3. The name of Atmel may not be used to endorse or promote products derived
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23 * from this software without specific prior written permission.
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25 * 4. This software may only be redistributed and used in connection with an
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26 * Atmel microcontroller product.
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28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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38 * POSSIBILITY OF SUCH DAMAGE.
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45 #ifndef CONF_CLOCKS_H_INCLUDED
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46 # define CONF_CLOCKS_H_INCLUDED
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48 /* System clock bus configuration */
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49 # define CONF_CLOCK_CPU_CLOCK_FAILURE_DETECT true
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50 # define CONF_CLOCK_FLASH_WAIT_STATES 2
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51 # define CONF_CLOCK_CPU_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
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52 # define CONF_CLOCK_APBA_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
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53 # define CONF_CLOCK_APBB_DIVIDER SYSTEM_MAIN_CLOCK_DIV_1
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56 /* SYSTEM_CLOCK_SOURCE_OSC8M configuration - Internal 8MHz oscillator */
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57 # define CONF_CLOCK_OSC8M_PRESCALER SYSTEM_OSC8M_DIV_1
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58 # define CONF_CLOCK_OSC8M_ON_DEMAND true
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59 # define CONF_CLOCK_OSC8M_RUN_IN_STANDBY false
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61 /* SYSTEM_CLOCK_SOURCE_XOSC configuration - External clock/oscillator */
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62 # define CONF_CLOCK_XOSC_ENABLE false
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63 # define CONF_CLOCK_XOSC_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL
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64 # define CONF_CLOCK_XOSC_EXTERNAL_FREQUENCY 12000000UL
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65 # define CONF_CLOCK_XOSC_STARTUP_TIME SYSTEM_XOSC_STARTUP_32768
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66 # define CONF_CLOCK_XOSC_AUTO_GAIN_CONTROL true
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67 # define CONF_CLOCK_XOSC_ON_DEMAND true
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68 # define CONF_CLOCK_XOSC_RUN_IN_STANDBY false
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70 /* SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock oscillator */
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71 # define CONF_CLOCK_XOSC32K_ENABLE false
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72 # define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL SYSTEM_CLOCK_EXTERNAL_CRYSTAL
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73 # define CONF_CLOCK_XOSC32K_STARTUP_TIME SYSTEM_XOSC32K_STARTUP_65536
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74 # define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL true
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75 # define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT false
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76 # define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT true
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77 # define CONF_CLOCK_XOSC32K_ON_DEMAND true
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78 # define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY false
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80 /* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */
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81 # define CONF_CLOCK_OSC32K_ENABLE false
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82 # define CONF_CLOCK_OSC32K_STARTUP_TIME SYSTEM_OSC32K_STARTUP_128
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83 # define CONF_CLOCK_OSC32K_ENABLE_1KHZ_OUTPUT true
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84 # define CONF_CLOCK_OSC32K_ENABLE_32KHZ_OUTPUT true
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85 # define CONF_CLOCK_OSC32K_ON_DEMAND true
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86 # define CONF_CLOCK_OSC32K_RUN_IN_STANDBY false
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88 /* SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop */
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89 # define CONF_CLOCK_DFLL_ENABLE true
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90 # define CONF_CLOCK_DFLL_LOOP_MODE SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED
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91 # define CONF_CLOCK_DFLL_ON_DEMAND false
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92 # define CONF_CLOCK_DFLL_RUN_IN_STANDBY false
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94 /* DFLL open loop mode configuration */
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95 # define CONF_CLOCK_DFLL_COARSE_VALUE (0x1f / 4)
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96 # define CONF_CLOCK_DFLL_FINE_VALUE (0xff / 4)
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98 /* DFLL closed loop mode configuration */
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99 # define CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR GCLK_GENERATOR_1
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100 # define CONF_CLOCK_DFLL_MULTIPLY_FACTOR 6
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101 # define CONF_CLOCK_DFLL_QUICK_LOCK true
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102 # define CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK true
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103 # define CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP true
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104 # define CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE true
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105 # define CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE (0x1f / 4)
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106 # define CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE (0xff / 4)
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109 /* Set this to true to configure the GCLK when running clocks_init. If set to
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110 * false, none of the GCLK generators will be configured in clocks_init(). */
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111 # define CONF_CLOCK_CONFIGURE_GCLK true
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113 /* Configure GCLK generator 0 (Main Clock) */
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114 # define CONF_CLOCK_GCLK_0_ENABLE true
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115 # define CONF_CLOCK_GCLK_0_RUN_IN_STANDBY false
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116 # define CONF_CLOCK_GCLK_0_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_DFLL
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117 # define CONF_CLOCK_GCLK_0_PRESCALER 1
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118 # define CONF_CLOCK_GCLK_0_OUTPUT_ENABLE false
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120 /* Configure GCLK generator 1 */
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121 # define CONF_CLOCK_GCLK_1_ENABLE true
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122 # define CONF_CLOCK_GCLK_1_RUN_IN_STANDBY false
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123 # define CONF_CLOCK_GCLK_1_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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124 # define CONF_CLOCK_GCLK_1_PRESCALER 1
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125 # define CONF_CLOCK_GCLK_1_OUTPUT_ENABLE false
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127 /* Configure GCLK generator 2 (RTC) */
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128 # define CONF_CLOCK_GCLK_2_ENABLE false
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129 # define CONF_CLOCK_GCLK_2_RUN_IN_STANDBY false
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130 # define CONF_CLOCK_GCLK_2_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC32K
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131 # define CONF_CLOCK_GCLK_2_PRESCALER 32
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132 # define CONF_CLOCK_GCLK_2_OUTPUT_ENABLE false
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134 /* Configure GCLK generator 3 */
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135 # define CONF_CLOCK_GCLK_3_ENABLE false
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136 # define CONF_CLOCK_GCLK_3_RUN_IN_STANDBY false
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137 # define CONF_CLOCK_GCLK_3_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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138 # define CONF_CLOCK_GCLK_3_PRESCALER 1
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139 # define CONF_CLOCK_GCLK_3_OUTPUT_ENABLE false
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141 /* Configure GCLK generator 4 */
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142 # define CONF_CLOCK_GCLK_4_ENABLE false
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143 # define CONF_CLOCK_GCLK_4_RUN_IN_STANDBY false
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144 # define CONF_CLOCK_GCLK_4_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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145 # define CONF_CLOCK_GCLK_4_PRESCALER 1
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146 # define CONF_CLOCK_GCLK_4_OUTPUT_ENABLE false
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148 /* Configure GCLK generator 5 */
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149 # define CONF_CLOCK_GCLK_5_ENABLE false
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150 # define CONF_CLOCK_GCLK_5_RUN_IN_STANDBY false
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151 # define CONF_CLOCK_GCLK_5_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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152 # define CONF_CLOCK_GCLK_5_PRESCALER 1
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153 # define CONF_CLOCK_GCLK_5_OUTPUT_ENABLE false
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155 /* Configure GCLK generator 6 */
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156 # define CONF_CLOCK_GCLK_6_ENABLE false
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157 # define CONF_CLOCK_GCLK_6_RUN_IN_STANDBY false
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158 # define CONF_CLOCK_GCLK_6_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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159 # define CONF_CLOCK_GCLK_6_PRESCALER 1
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160 # define CONF_CLOCK_GCLK_6_OUTPUT_ENABLE false
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162 /* Configure GCLK generator 7 */
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163 # define CONF_CLOCK_GCLK_7_ENABLE false
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164 # define CONF_CLOCK_GCLK_7_RUN_IN_STANDBY false
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165 # define CONF_CLOCK_GCLK_7_CLOCK_SOURCE SYSTEM_CLOCK_SOURCE_OSC8M
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166 # define CONF_CLOCK_GCLK_7_PRESCALER 1
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167 # define CONF_CLOCK_GCLK_7_OUTPUT_ENABLE false
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169 #endif /* CONF_CLOCKS_H_INCLUDED */
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