Microchip Technology /ATSAMS70Q19B /SDRAMC /MR

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Interpret as MR

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 0 (NORMAL)MODE

MODE=NORMAL

Description

SDRAMC Mode Register

Fields

MODE

SDRAMC Command Mode

0 (NORMAL): Normal mode. Any access to the SDRAM is decoded normally. To activate this mode, the command must be followed by a write to the SDRAM.

1 (NOP): The SDRAMC issues a NOP command when the SDRAM device is accessed regardless of the cycle. To activate this mode, the command must be followed by a write to the SDRAM.

2 (ALLBANKS_PRECHARGE): The SDRAMC issues an ‘All Banks Precharge’ command when the SDRAM device is accessed regardless of the cycle. To activate this mode, the command must be followed by a write to the SDRAM.

3 (LOAD_MODEREG): The SDRAMC issues a ‘Load Mode Register’ command when the SDRAM device is accessed regardless of the cycle. To activate this mode, the command must be followed by a write to the SDRAM.

4 (AUTO_REFRESH): The SDRAMC issues an ‘Auto-Refresh’ Command when the SDRAM device is accessed regardless of the cycle. Previously, an ‘All Banks Precharge’ command must be issued. To activate this mode, the command must be followed by a write to the SDRAM.

5 (EXT_LOAD_MODEREG): The SDRAMC issues an ‘Extended Load Mode Register’ command when the SDRAM device is accessed regardless of the cycle. To activate this mode, the ‘Extended Load Mode Register’ command must be followed by a write to the SDRAM. The write in the SDRAM must be done in the appropriate bank; most low-power SDRAM devices use the bank 1.

6 (DEEP_POWERDOWN): Deep Power-down mode. Enters Deep Power-down mode.

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