2.6.4.5.2 Operation
LDR loads a register with a value from a PC-relative memory address. The memory address is specified by a label or by an offset from the PC.
The value to load or store can be a byte, halfword, or word. For load instructions, bytes and halfwords can either be signed or unsigned. See 2.6.3.5 Address Alignment.
label must be within a limited range of the current instruction. The following table shows the possible offsets between label and the PC.
| Instruction type | Offset range |
|---|---|
| Word, halfword, signed halfword, byte, signed byte | -4095 to 4095 |
| Two words | -1020 to 1020 |
Note: You might have to use the .W suffix to get the maximum offset range. See 2.6.3.8 Instruction Width Selection.