LDRB(1) (Thumb*) -Load Register Byte

Syntax

LDRB dest, [basereg, #value]

where:

dest	Destination register
basereg	Register containing base address
value	5-bit value added to basereg

Description 

The LDRB instruction in this format loads a byte from value and basereg into dest . This byte is zero-extended into a 32-bit word. It enables access to structure (record) fields.

Flags Affected 

N	Z	C	V	Q	S	I	F	T

Encoding

15	14	13	12	11	10		6	5		3	2		0
0	1	1	1	1	value			basereg			dest

Example

1                                        ;@.text
2                                        ;@.globl funldrb
3                                        ;@.align 0
4                                        ;
5                                    AREA example,CODE,READONLY
6                                    CODE16
7
8                                    label1
9                                        ; Load register R4 from address in
10                                       ; memory given by value of R1
11                                       ; plus offset of 12 bytes
12                                       ; Only a single byte is loaded into
13                                       ; low byte of register which is
14                                       ; then zero-extended to 32 bits
15    00000000    880C    LDRB    R4, [R1, #OxC]

Further Information 

See LDRB(2) Instruction
See LDRSB Instruction
See STRB(1) Instruction
See STRB(2) Instruction