struct_nand_sdr_timings (9) - Linux Man Pages

struct_nand_sdr_timings: SDR NAND chip timings

NAME

struct_nand_sdr_timings - SDR NAND chip timings

SYNOPSIS

struct nand_sdr_timings {
  u32 tALH_min;
  u32 tADL_min;
  u32 tALS_min;
  u32 tAR_min;
  u32 tCEA_max;
  u32 tCH_min;
  u32 tCHZ_max;
  u32 tCLH_min;
  u32 tCLR_min;
  u32 tCLS_min;
  u32 tCOH_min;
  u32 tCS_min;
  u32 tDH_min;
  u32 tDS_min;
  u32 tFEAT_max;
  u32 tIR_min;
  u32 tITC_max;
  u32 tRC_min;
  u32 tREA_max;
  u32 tREH_min;
  u32 tRHOH_min;
  u32 tRHW_min;
  u32 tRHZ_max;
  u32 tRLOH_min;
  u32 tRP_min;
  u32 tRR_min;
  u64 tRST_max;
  u32 tWB_max;
  u32 tWC_min;
  u32 tWH_min;
  u32 tWHR_min;
  u32 tWP_min;
  u32 tWW_min;
};  

MEMBERS

tALH_min

ALE hold time

tADL_min

ALE to data loading time

tALS_min

ALE setup time

tAR_min

ALE to RE# delay

tCEA_max

CE# access time

tCH_min

CE# hold time

tCHZ_max

CE# high to output hi-Z

tCLH_min

CLE hold time

tCLR_min

CLE to RE# delay

tCLS_min

CLE setup time

tCOH_min

CE# high to output hold

tCS_min

CE# setup time

tDH_min

Data hold time

tDS_min

Data setup time

tFEAT_max

Busy time for Set Features and Get Features

tIR_min

Output hi-Z to RE# low

tITC_max

Interface and Timing Mode Change time

tRC_min

RE# cycle time

tREA_max

RE# access time

tREH_min

RE# high hold time

tRHOH_min

RE# high to output hold

tRHW_min

RE# high to WE# low

tRHZ_max

RE# high to output hi-Z

tRLOH_min

RE# low to output hold

tRP_min

RE# pulse width

tRR_min

Ready to RE# low (data only)

tRST_max

Device reset time, measured from the falling edge of R/B# to the rising edge of R/B#.

tWB_max

WE# high to SR[6] low

tWC_min

WE# cycle time

tWH_min

WE# high hold time

tWHR_min

WE# high to RE# low

tWP_min

WE# pulse width

tWW_min

WP# transition to WE# low

DESCRIPTION

This struct defines the timing requirements of a SDR NAND chip. These information can be found in every NAND datasheets and the timings meaning are described in the ONFI specifications: www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf (chapter 4.15 Timing Parameters)

All these timings are expressed in picoseconds.

AUTHOR

Thomas Gleixner <tglx [at] linutronix.de>

Author.

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