38 lines
2.1 KiB
Markdown
38 lines
2.1 KiB
Markdown
|
来源：PM0214 Rev 10，Page 12
|
|||
|
|
|
|||
|
|
# 1 About this document
|
|||
|
|
|
|||
|
|
This document provides the information required for application and system-level software development. It does not provide information on debug components, features, or operation.
|
|||
|
|
|
|||
|
|
This material is for microcontroller software and hardware engineers, including those who have no experience of Arm products.
|
|||
|
|
|
|||
|
|
This document applies to Arm®(a)-based devices.
|
|||
|
|
|
|||
|
|
## 1.1 Typographical conventions
|
|||
|
|
|
|||
|
|
The typographical conventions used in this document are:
|
|||
|
|
|
|||
|
|
| Style | Indication |
|
|||
|
|
|-------|------------|
|
|||
|
|
| italic | Highlights important notes, introduces special terminology, denotes internal cross-references, and citations. |
|
|||
|
|
| **bold** | Highlights interface elements, such as menu names. Denotes signal names. Also used for terms in descriptive lists, where appropriate. |
|
|||
|
|
| `monospace` | Denotes text that you can enter at the keyboard, such as commands, file and program names, and source code. |
|
|||
|
|
| `monospace` | Denotes a permitted abbreviation for a command or option. You can enter the underlined text instead of the full command or option name. |
|
|||
|
|
| `monospace italic` | Denotes arguments to monospace text where the argument is to be replaced by a specific value. |
|
|||
|
|
| `monospace bold` | Denotes language keywords when used outside example code. |
|
|||
|
|
|
|||
|
|
## 1.2 List of abbreviations for registers
|
|||
|
|
|
|||
|
|
The following abbreviations are used in register descriptions:
|
|||
|
|
|
|||
|
|
| Abbreviation | Meaning |
|
|||
|
|
|--------------|---------|
|
|||
|
|
| read/write (rw) | Software can read and write to these bits. |
|
|||
|
|
| read-only (r) | Software can only read these bits. |
|
|||
|
|
| write-only (w) | Software can only write to this bit. Reading the bit returns the reset value. |
|
|||
|
|
| read/clear (rc_w1) | Software can read as well as clear this bit by writing 1. Writing '0' has no effect on the bit value. |
|
|||
|
|
| read/clear (rc_w0) | Software can read as well as clear this bit by writing 0. Writing '1' has no effect on the bit value. |
|
|||
|
|
| toggle (t) | Software can only toggle this bit by writing '1'. Writing '0' has no effect. |
|
|||
|
|
| Reserved (Res.) | Reserved bit, must be kept at reset value. |
|
|||
|
|
|
|||
|
|
> 原始图片：imgs/page_12_*.png（无图则注明无图）
|