ctrlwidth

This register controls the width of the physical DRAM interface.
Module Instance Base Address Register Address
sdr 0xFFC20000 0xFFC25060

Offset: 0x5060

Access: RW

Important: To prevent indeterminate system behavior, reserved areas of memory must not be accessed by software or hardware. Any area of the memory map that is not explicitly defined as a register space or accessible memory is considered reserved.
Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

Reserved

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Reserved

ctrlwidth

RW 0x0

ctrlwidth Fields

Bit Name Description Access Reset
1:0 ctrlwidth
This field specifies the SDRAM controller interface width:
Value Description
0x0 8-bit interface width
0x1 16-bit (no ECC) or 24-bit (ECC enabled) interface width
0x2 32-bit (no ECC) or 40-bit (ECC enabled) interface width
Additionally, you must program the dramifwidth register.
RW 0x0