_semc_sdram_config Struct Reference

SEMC SDRAM configuration structure. More...

#include <fsl_semc.h>

Data Fields
semc_iomux_pin	csxPinMux
uint32_t	address
uint32_t	memsize_kbytes
smec_port_size_t	portSize
sem_sdram_burst_len_t	burstLen
semc_sdram_column_bit_num_t	columnAddrBitNum
semc_caslatency_t	casLatency
uint8_t	tPrecharge2Act_Ns
uint8_t	tAct2ReadWrite_Ns
uint8_t	tRefreshRecovery_Ns
uint8_t	tWriteRecovery_Ns
uint8_t	tCkeOff_Ns
uint8_t	tAct2Prechage_Ns
uint8_t	tSelfRefRecovery_Ns
uint8_t	tRefresh2Refresh_Ns
uint8_t	tAct2Act_Ns
uint32_t	tPrescalePeriod_Ns
uint32_t	tIdleTimeout_Ns
uint32_t	refreshPeriod_nsPerRow
uint32_t	refreshUrgThreshold
uint8_t	refreshBurstLen

Detailed Description

SEMC SDRAM configuration structure.

1. The memory size in the configuration is in the unit of KB. So memsize_kbytes should be set as 2^2, 2^3, 2^4 .etc which is base 2KB exponential function. Take refer to BR0~BR3 register in RM for details.
2. The prescalePeriod_N16Cycle is in unit of 16 clock cycle. It is a exception for prescaleTimer_n16cycle = 0, it means the prescaler timer period is 256 * 16 clock cycles. For precalerIf precalerTimer_n16cycle not equal to 0, The prescaler timer period is prescalePeriod_N16Cycle * 16 clock cycles. idleTimeout_NprescalePeriod, refreshUrgThreshold_NprescalePeriod, refreshPeriod_NprescalePeriod are similar to prescalePeriod_N16Cycle.

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The documentation for this struct was generated from the following file:

• bsps/arm/imxrt/mcux-sdk/drivers/semc/fsl_semc.h