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The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : rdwr_en_lo_cnt

Description

Read/Write Enable low pulse width

Register Layout

Bits Access Reset Description
[4:0] RW 0x12 ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE
[31:5] ??? 0x0 UNDEFINED

Field : value

Number of nand_mp_clk cycles that read or write enable will kept low to meet the min Trp/Twp parameter of the device. The value in this register plus rdwr_en_hi_cnt register value should meet the min cycle time of the device connected. The default value is calculated assuming the max nand_mp_clk time period of 4ns to work with ONFI Mode 0 mode of 100ns device cycle time. This assumes a 1x/4x clocking scheme.

Field Access Macros:

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_LSB   0
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_MSB   4
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_WIDTH   5
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_SET_MSK   0x0000001f
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_CLR_MSK   0xffffffe0
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_RESET   0x12
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_GET(value)   (((value) & 0x0000001f) >> 0)
 
#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_SET(value)   (((value) << 0) & 0x0000001f)
 

Data Structures

struct  ALT_NAND_CFG_RDWR_EN_LO_CNT_s
 

Macros

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_OFST   0x1f0
 

Typedefs

typedef struct
ALT_NAND_CFG_RDWR_EN_LO_CNT_s 
ALT_NAND_CFG_RDWR_EN_LO_CNT_t
 

Data Structure Documentation

struct ALT_NAND_CFG_RDWR_EN_LO_CNT_s

WARNING: The C register and register group struct declarations are provided for convenience and illustrative purposes. They should, however, be used with caution as the C language standard provides no guarantees about the alignment or atomicity of device memory accesses. The recommended practice for writing hardware drivers is to use the SoCAL access macros and alt_read_word() and alt_write_word() functions.

The struct declaration for register ALT_NAND_CFG_RDWR_EN_LO_CNT.

Data Fields
uint32_t value: 5 ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE
uint32_t __pad0__: 27 UNDEFINED

Macro Definitions

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_LSB   0

The Least Significant Bit (LSB) position of the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_MSB   4

The Most Significant Bit (MSB) position of the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_WIDTH   5

The width in bits of the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_SET_MSK   0x0000001f

The mask used to set the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field value.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_CLR_MSK   0xffffffe0

The mask used to clear the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field value.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_RESET   0x12

The reset value of the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_GET (   value)    (((value) & 0x0000001f) >> 0)

Extracts the ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE field value from a register.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE_SET (   value)    (((value) << 0) & 0x0000001f)

Produces a ALT_NAND_CFG_RDWR_EN_LO_CNT_VALUE register field value suitable for setting the register.

#define ALT_NAND_CFG_RDWR_EN_LO_CNT_OFST   0x1f0

The byte offset of the ALT_NAND_CFG_RDWR_EN_LO_CNT register from the beginning of the component.

Typedef Documentation

The typedef declaration for register ALT_NAND_CFG_RDWR_EN_LO_CNT.