Struct Ddr2Grade 

pub struct Ddr2Grade {

    pub part: &'static str,
    pub banks: u32,
    pub row_bits: u32,
    pub col_bits: u32,
    pub dq_bits: u32,
    pub cl_floors: &'static [(u64, u64)],
    pub tck_max_ps: u64,
    pub trcd_ps: u64,
    pub trp_ps: u64,
    pub tras_ps: u64,
    pub tras_max_ps: u64,
    pub trc_ps: u64,
    pub trrd_ps: u64,
    pub tfaw_ps: u64,
    pub twr_ps: u64,
    pub twtr_ps: u64,
    pub trtp_ps: u64,
    pub trfc_ps: u64,
    pub trefi_ps: u64,
    pub tccd_ck: u64,
}

A DDR2 speed grade: its geometry, the CAS latency each clock period allows, and its datasheet minimums (and the tRAS and tREFI maximums), in picoseconds unless named in clocks.

Fields

part: &'static str

banks: u32

row_bits: u32

col_bits: u32

dq_bits: u32

cl_floors: &'static [(u64, u64)]

(tCK floor, CL) by rising CL: a CAS latency runs at any clock period from its floor up to tck_max_ps.

tck_max_ps: u64

trcd_ps: u64

trp_ps: u64

tras_ps: u64

tras_max_ps: u64

trc_ps: u64

trrd_ps: u64

tfaw_ps: u64

twr_ps: u64

twtr_ps: u64

trtp_ps: u64

trfc_ps: u64

trefi_ps: u64

tccd_ck: u64

Implementations

impl Ddr2Grade

pub const MT47H64M16_25: Ddr2Grade

Micron MT47H64M16 (1 Gb, x16, 8 banks), speed grade -25: DDR2-800 at CL 6. The Nexys A7-100T carries this part, MT47H64M16HR-25:H. Micron 1Gb DDR2 datasheet, Rev. V 6/10: Table 1 and Table 12’s x16 rows.

pub const MT47H64M16_25E: Ddr2Grade

The same part’s -25E grade: DDR2-800 at CL 5.

pub fn at(&self, tck_ps: u64, bl: u64) -> Result<Ddr2Timing, String>

The grade clocked at tck_ps with burst length bl, or why the part cannot run that way.

Trait Implementations

impl Clone for Ddr2Grade

fn clone(&self) -> Ddr2Grade

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Ddr2Grade

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Ddr2Grade

fn eq(&self, other: &Ddr2Grade) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Ddr2Grade

impl Eq for Ddr2Grade

impl StructuralPartialEq for Ddr2Grade