| /** | |
| * \file | |
| * | |
| * \brief SAM3X clock configuration. | |
| * | |
| * Copyright (c) 2011 - 2012 Atmel Corporation. All rights reserved. | |
| * | |
| * \asf_license_start | |
| * | |
| * \page License | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions are met: | |
| * | |
| * 1. Redistributions of source code must retain the above copyright notice, | |
| * this list of conditions and the following disclaimer. | |
| * | |
| * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| * this list of conditions and the following disclaimer in the documentation | |
| * and/or other materials provided with the distribution. | |
| * | |
| * 3. The name of Atmel may not be used to endorse or promote products derived | |
| * from this software without specific prior written permission. | |
| * | |
| * 4. This software may only be redistributed and used in connection with an | |
| * Atmel microcontroller product. | |
| * | |
| * 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 | |
| * EXPRESSLY AND SPECIFICALLY 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. | |
| * | |
| * \asf_license_stop | |
| * | |
| */ | |
| #ifndef CONF_CLOCK_H_INCLUDED | |
| #define CONF_CLOCK_H_INCLUDED | |
| // ===== System Clock (MCK) Source Options | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_SLCK_RC | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_SLCK_XTAL | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_SLCK_BYPASS | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_MAINCK_4M_RC | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_MAINCK_8M_RC | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_MAINCK_12M_RC | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_MAINCK_XTAL | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_MAINCK_BYPASS | |
| #define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_PLLACK | |
| //#define CONFIG_SYSCLK_SOURCE SYSCLK_SRC_UPLLCK | |
| // ===== System Clock (MCK) Prescaler Options (Fmck = Fsys / (SYSCLK_PRES)) | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_1 | |
| #define CONFIG_SYSCLK_PRES SYSCLK_PRES_2 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_4 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_8 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_16 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_32 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_64 | |
| //#define CONFIG_SYSCLK_PRES SYSCLK_PRES_3 | |
| // ===== PLL0 (A) Options (Fpll = (Fclk * PLL_mul) / PLL_div) | |
| // Use mul and div effective values here. | |
| #define CONFIG_PLL0_SOURCE PLL_SRC_MAINCK_XTAL | |
| #define CONFIG_PLL0_MUL 14 | |
| #define CONFIG_PLL0_DIV 1 | |
| // ===== UPLL (UTMI) Hardware fixed at 480 MHz. | |
| // ===== USB Clock Source Options (Fusb = FpllX / USB_div) | |
| // Use div effective value here. | |
| //#define CONFIG_USBCLK_SOURCE USBCLK_SRC_PLL0 | |
| //#define CONFIG_USBCLK_SOURCE USBCLK_SRC_UPLL | |
| //#define CONFIG_USBCLK_DIV 1 | |
| // ===== Target frequency (System clock) | |
| // - XTAL frequency: 12MHz | |
| // - System clock source: PLLA | |
| // - System clock prescaler: 2 (divided by 2) | |
| // - PLLA source: XTAL | |
| // - PLLA output: XTAL * 14 / 1 | |
| // - System clock is: 12 * 14 / 1 /2 = 84MHz | |
| // ===== Target frequency (USB Clock) | |
| // - USB clock source: UPLL | |
| // - USB clock divider: 1 (not divided) | |
| // - UPLL frequency: 480MHz | |
| // - USB clock: 480 / 1 = 480MHz | |
| #endif /* CONF_CLOCK_H_INCLUDED */ |