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bsp/lpc24xx: Add SDRAM mode settings comment

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This commit is contained in:
Sebastian Huber
2019-05-09 09:16:20 +02:00
parent 0b74d8f0fe
commit 6cad529ccb
1 changed files with 10 additions and 1 deletions
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11
bsps/arm/lpc24xx/start/start-config-emc-dynamic.c
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@@ -232,6 +232,15 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_config
#endif
};
/*
* Mode shift is determined for RBC by:
*
* bus width in bits / 16 + bank bits + column bits
*
* Mode shift is determined for BRC by:
*
* bus width in bits / 16 + column bits
*/
BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_chip_config
lpc24xx_start_config_emc_dynamic_chip [] = {
#if defined(LPC24XX_EMC_MT48LC4M16A2)
@@ -240,7 +249,7 @@ BSP_START_DATA_SECTION const lpc24xx_emc_dynamic_chip_config
/*
* Use SDRAM, 0 0 001 01 address mapping, disabled buffer, unprotected
* writes. 4 banks, 12 row lines, 8 column lines.
* writes. 4 banks, 12 row lines, 8 column lines, RBC.
*/
.config = 0x280,