SDRAM_Initialize

Namespace: None
Files: AS4C16M32SB.h / AS4C16M32SB.cpp
Directory: DAD_FORGE/Drivers
Description: SDRAM controller initialization for the AS4C16M32SB (64MB) chip

📋 Function Description

The SDRAM Initialize function initializes the FMC SDRAM controller for the AS4C16M32SB memory, a 64MB synchronous SDRAM chip. This initialization strictly follows the sequence required by the manufacturer’s datasheet (AS4C16M32SB).

📚 Function

AS4C16M32SB_Initialize

Method void AS4C16M32SB_Initialize()

Description
Completely initializes the AS4C16M32SB SDRAM controller by executing the required initialization sequence:

1) CLK_ENABLE command to activate the clock,
2) 1ms stabilization delay,
3) PALL (Precharge All) command to empty the banks,
4) AUTOREFRESH command to configure the refresh cycle,
5) LOAD_MODE command with Mode Register Definition 0x0020 (CAS=3, BL=1 sequential),
6) Refresh rate programming to 920 cycles (≈7.8µs).

All commands are sent via HAL_SDRAM_SendCommand with a 1ms timeout each.