Struct stm32h7::stm32h743v::fmc::sdrtr::SDRTR_SPEC

pub struct SDRTR_SPEC;

This register sets the refresh rate in number of SDCLK clock cycles between the refresh cycles by configuring the Refresh Timer Count value.Examplewhere 64 ms is the SDRAM refresh period.The refresh rate must be increased by 20 SDRAM clock cycles (as in the above example) to obtain a safe margin if an internal refresh request occurs when a read request has been accepted. It corresponds to a COUNT value of 0000111000000 (448). This 13-bit field is loaded into a timer which is decremented using the SDRAM clock. This timer generates a refresh pulse when zero is reached. The COUNT value must be set at least to 41 SDRAM clock cycles.As soon as the FMC_SDRTR register is programmed, the timer starts counting. If the value programmed in the register is 0, no refresh is carried out. This register must not be reprogrammed after the initialization procedure to avoid modifying the refresh rate.Each time a refresh pulse is generated, this 13-bit COUNT field is reloaded into the counter.If a memory access is in progress, the Auto-refresh request is delayed. However, if the memory access and Auto-refresh requests are generated simultaneously, the Auto-refresh takes precedence. If the memory access occurs during a refresh operation, the request is buffered to be processed when the refresh is complete.This register is common to SDRAM bank 1 and bank 2.

This register you can read, write_with_zero, reset, write, modify. See API.

For information about available fields see sdrtr module

Trait Implementations

impl Readable for SDRTR_SPEC

read() method returns sdrtr::R reader structure

type Reader = R

Result from a call to read and argument to modify.

impl RegisterSpec for SDRTR_SPEC

type Ux = u32

Raw register type (u8, u16, u32, …).

impl Resettable for SDRTR_SPEC

reset() method sets SDRTR to value 0

fn reset_value() -> Self::Ux

Reset value of the register.

impl Writable for SDRTR_SPEC

write(|w| ..) method takes sdrtr::W writer structure

type Writer = W

Writer type argument to write, et al.