Sdram Size And Configuration - Samsung S3C2500B User Manual

S3C2500B MEMORY CONTROLLER

5.7.2 SDRAM SIZE AND CONFIGURATION

The SDRAM controller supports a SDRAM memory ranging from 2 to 256M-byte. Table 5-19. Illustrates the
supported SDRAM configurations when external bus width is 32-bits. Table 5-20. Illustrates the supported
SDRAM configurations when external bus width is 16 bits.
If 16M-bit device, which has two leaves, is used, only ADDR[13] is used to select a leaf.
If SDRAM device, which has four leaves, is used, both ADDR[14] and ADDR[13] are used to select a leaf.
Only the chip select signals (nSDCS[1:0]) are to select a bank. The other SDRAM control signals are common to
both banks.
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