Struct stm32h7::stm32h743::fmc::SDRTR

pub struct SDRTR { /* fields omitted */ }

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.

Methods

impl SDRTR

pub fn modify<F>(&self, f: F) where
    F: FnOnce(&R, &'w mut W) -> &'w mut W, 

Modifies the contents of the register

pub fn read(&self) -> R

Reads the contents of the register

pub fn write<F>(&self, f: F) where
    F: FnOnce(&mut W) -> &mut W, 

Writes to the register

pub const fn reset_value() -> u32

Reset value of the register

pub fn reset(&self)

Writes the reset value to the register