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Immediate offset problem with the LDR commands

Bulent Unalmis

Compiler give error message for following codes.
A1174E: "Data transfer offset 0x00000102 out of range. Permitted values are 0x00..0x1F"

    LDR   R1,=USB_BASE
    LDRB  R0,[R1,#USB0_CSRL0] ; Error code is A1174E !!!!

USB_BASE   EQU 0x40050000
USB0_CSRL0 EQU 0x102

But compiler dont give any error if i write this program thats way

USB_BASE   EQU 0x40050000
USB0_CSRL0 EQU 0x102

    LDR   R1,=USB_BASE
    LDRB  R0,[R1,#USB0_CSRL0] ; Error code is A1174E !!!!

What is wrong?

0