AMD Elan SC520 - Supported SDRAM Devices; Table 10-8 SDRAM Devices Supported with Column Boundary Specification

SDRAM Controller
Élan™SC520 Microcontroller User’s Manual 10-13
10.5.2.1 Supported SDRAM Devices
The ÉlanSC520 microcontroller supports the SDRAM organizations listed in Table 10-8.
(Note that SDRAM devices requiring less than 11 row address bits are not supported, and
are not included in the table.)
This table includes
all possible device organizations supported by the column boundary
method, including those that may not be available at this time. As shown, the column
boundary method allows the user to configure the ÉlanSC520 microcontroller to work with
16-Mbit, 64-Mbit, 128-Mbit, and 256-Mbit SDRAM densities (both 2-bank and 4-bank
internal architectures), requiring 8-bit through 11-bit column address bits. Note that 14-bit
(2 internal bank) devices can be supported by connecting the BA1 pin to the most significant
address pin of the devices.
Note that
illegal device symmetries have been omitted from Table 10-8. Illegal symmetries
are those where the column width exceeds the row width dimension.
Table 10-8 SDRAM Devices Supported with Column Boundary Specification
Column
Width Density Banks Organization Device Architecture
Device
Count
per Bank
Dimension
Row: Col
MA/BA
Width
Bank
(32-Bit)
8-bit 16 Mbit 2 4M x 4 2M x 4 x 2-banks 8 13:8 14-bit 16 Mbytes
2M x 8 1M x 8 x 2-banks 4 12:8 13-bit 8 Mbytes
1M x 16 512K x 16 x 2-banks 2 11:8 12-bit 4 Mbytes
4 4M x 4 1M x 4 x 4-banks 8 12:8 14-bit 16 Mbytes
2M x 8 512K x 8 x 4-banks 4 11:8 13-bit 8 Mbytes
64 Mbit 2 8M x 8 4M x 8 x 2-banks 4 14:8 15-bit 32 Mbytes
4M x 16 2M x 16 x 2-banks 2 13:8 14-bit 16 Mbytes
2M x 32 1M x 32 x 2-banks 1 12:8 13-bit 8 Mbytes
4 8M x 8 2M x 8 x 4-banks 4 13:8 15-bit 32 Mbytes
4M x 16 1M x 16 x 4-banks 2 12:8 14-bit 16 Mbytes
2M x 32 512K x 32 x 4-banks 1 11:8 13-bit 8 Mbytes
128 Mbit 2 8M x 16 4M x 16 x 2-banks 2 14:8 15-bit 32 Mbytes
4M x 32 2M x 32 x 2-banks 1 13:8 14-bit 16 Mbytes
4 8M x 16 2M x 16 x 4-banks 2 13:8 15-bit 32 Mbytes
4M x 32 1M x 32 x 4-banks 1 12:8 14-bit 16 Mbytes
256 Mbit 2 8M x 32 4M x 32 x 2-banks 1 14:8 15-bit 32 Mbytes
4 8M x 32 2M x 32 x 4-banks 1 13:8 15-bit 32 Mbytes