STMicroelectronics /STM32H7x5_CM4 /FMC /SDCR2

Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text Text

Interpret as SDCR2

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0NC0NR0MWID 0 (NB)NB 0CAS0 (WP)WP 0SDCLK 0 (RBURST)RBURST 0RPIPE

Description

This register contains the control parameters for each SDRAM memory bank

Fields

NC

Number of column address bits These bits define the number of bits of a column address.

NR

Number of row address bits These bits define the number of bits of a row address.

MWID

Memory data bus width. These bits define the memory device width.

NB

Number of internal banks This bit sets the number of internal banks.

CAS

CAS Latency This bits sets the SDRAM CAS latency in number of memory clock cycles

WP

Write protection This bit enables write mode access to the SDRAM bank.

SDCLK

SDRAM clock configuration These bits define the SDRAM clock period for both SDRAM banks and allow disabling the clock before changing the frequency. In this case the SDRAM must be re-initialized. Note: The corresponding bits in the FMC_SDCR2 register is read only.

RBURST

Burst read This bit enables burst read mode. The SDRAM controller anticipates the next read commands during the CAS latency and stores data in the Read FIFO. Note: The corresponding bit in the FMC_SDCR2 register is read only.

RPIPE

Read pipe These bits define the delay, in KCK_FMC clock cycles, for reading data after CAS latency. Note: The corresponding bits in the FMC_SDCR2 register is read only.

Links

()