LM3S1G21 Datasheet, PDF (512/955 Pages) Texas Instruments – Stellaris® LM3S1G21 Microcontroller

External Peripheral Interface (EPI)
Bit/Field
5:4
3:2
1:0
Name
EPADR
ERSZ
ERADR
Type
R/W
R/W
R/W
Reset
0x0
Description
External Peripheral Address
This field selects address mapping for the external peripheral area.
Value Description
0x0 Not mapped
0x1 At 0xA000.0000
0x2 At 0xC000.0000
0x3 reserved
0x0
External RAM Size
This field selects the size of mapped RAM. If the size of the external
memory is larger, a bus fault occurs. If the size of the external memory
is smaller, it wraps (upper address bits unused):
Value Description
0x0 256 bytes; lower address range: 0x00 to 0xFF
0x1 64 KB; lower address range: 0x0000 to 0xFFFF
0x2 16 MB; lower address range: 0x00.0000 to 0xFF.FFFF
0x3 512 MB; lower address range: 0x000.0000 to 0x1FFF.FFFF
0x0
External RAM Address
Selects address mapping for external RAM area:
Value Description
0x0 Not mapped
0x1 At 0x6000.0000
0x2 At 0x8000.0000
0x3 reserved
512
January 22, 2012
Texas Instruments-Production Data