Document Conventions; Table 2. Document Conventions - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230
2

Document Conventions

The conventions used in this document are shown in the following table.

Table 2. Document Conventions

Notation
0x
0xnnnn_nnnn 0x2000_0100
b
NAME [n]
NAME [m:n]
X
RW
RO
RC
WC
W0C
WO
Reserved
Word
Half-word
Byte
Rev. 1.10
Example
The number string with a 0x prefix indicates a hexadecimal
0x5a05
number.
32-bit Hexadecimal address or data.
The number string with a lowercase b prefix indicates a binary
b0101
number.
Specific bit of NAME. NAME can be a register or field of register.
ADDR [5]
For example, ADDR [5] means bit 5 of ADDR register (field).
Specific bits of NAME. NAME can be a register or field of
ADDR [11:5] register. For example, ADDR [11:5] means bit 11 to 5 of ADDR
register (field).
b10X1 Don't care notation which means any value is allowed.
19 18
Software can read and write to this bit.
SERDYIE PLLRDYIE
RW 0 RW 0
3 2
Software can only read this bit. A write operation will have no
HSIRDY HSERDY
effect.
RO 1 RO 0
1 0
Software can only read this bit. Read operation will clear it to 0
PDF BAK_PORF
automatically.
RC 0 RC 1
3 2
Software can read this bit or clear it by writing 1. Writing a 0 will
SERDYF PLLRDYF
have no effect.
WC 0 WC 0
1 0
Software can read this bit or clear it by writing 0. Writing a 1 will
RXCF PARF
have no effect.
RO 0 W0C 0
31 30
Software can only write to this bit. A read operation always
DB_CKSRC
returns 0.
WO 0 WO 0
Reserved bit(s) for future use. Data read from these bits is not
1 0
well defined and should be treated as random data. Normally
LLRDY Reserved
these reserved bits should be set to a 0 value. Note that
RO 0
reserved bit must be kept at reset value.
Data length of a word is 32-bit.
Data length of a half-word is 16-bit.
Data length of a byte is 8-bit.
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Description
November 09, 2018