The Definitive Guide to ARM® Cortex®-M0 and Cortex-M0+ Processors, 2nd Edition

Conventions

Various typographical conventions have been used in this book, as follows:

• Normal assembly program codes:

MOV R0, R1 ; Move data from Register R1 to Register R0

• Assembly code in generalized syntax; items inside “< >” must be replaced by real register names:

MRS <reg>, <special_reg> ;

• C program codes:

for (i = 0;i < 3;i++) { func1(); }

• Pseudo code:

if (a > b) { …

Values:

1. 4'hC, 0x123 are both hexadecimal values

2. #3 indicates item number 3 (e.g., IRQ #3 means IRQ number 3)

3. #immed_12 refers to 12-bit immediate data

4. Register bits—Typically used to illustrate a part of a value based on bit position. For example, bit[15:12] means bit number 15 down to 12.

Register access types:

1. R is Read only

2. W is Write only

3. R/W is Read or Write ...