rt-thread-official/bsp/imxrt/imxrt1052-nxp-evk/board/ports/sdram_port.h

50 lines
1.8 KiB
C

/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-12-05 zylx The first version for STM32F4xx
* 2019-4-25 misonyo port to IMXRT
*/
#ifndef SDRAM_PORT_H__
#define SDRAM_PORT_H__
/* parameters for sdram peripheral */
#define SDRAM_BANK_ADDR ((uint32_t)0x80000000U)
/* region#0/1/2/3: kSEMC_SDRAM_CS0/1/2/3 */
#define SDRAM_REGION kSEMC_SDRAM_CS0
/* CS pin: kSEMC_MUXCSX0/1/2/3 */
#define SDRAM_CS_PIN kSEMC_MUXCSX0
/* size(kbyte):32MB = 32*1024*1KBytes */
#define SDRAM_SIZE ((uint32_t)0x8000)
/* data width: kSEMC_PortSize8Bit,kSEMC_PortSize16Bit */
#define SDRAM_DATA_WIDTH kSEMC_PortSize16Bit
/* column bit numbers: kSEMC_SdramColunm_9/10/11/12bit */
#define SDRAM_COLUMN_BITS kSEMC_SdramColunm_9bit
/* cas latency clock number: kSEMC_LatencyOne/Two/Three */
#define SDRAM_CAS_LATENCY kSEMC_LatencyThree
/* Timing configuration for W9825G6KH */
/* TRP:precharge to active command time (ns) */
#define SDRAM_TRP 18
/* TRCD:active to read/write command delay time (ns) */
#define SDRAM_TRCD 18
/* The time between two refresh commands,Use the maximum of the (Trfc , Txsr).(ns) */
#define SDRAM_REFRESH_RECOVERY 67
/* TWR:write recovery time (ns). */
#define SDRAM_TWR 12
/* TRAS:active to precharge command time (ns). */
#define SDRAM_TRAS 42
/* TRC time (ns). */
#define SDRAM_TRC 60
/* active to active time (ns). */
#define SDRAM_ACT2ACT 60
/* refresh time (ns). 64ms */
#define SDRAM_REFRESH_ROW 64 * 1000000 / 8192
#endif /* SDRAM_PORT_H__ */