TXZ Family
Comparator
2017-10-11
5 / 14
Rev. 1.0
Conventions
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Numeric formats follow the rules as shown below:
Hexadecimal: 0xABC
Decimal:
123 or 0d123 – Only when it needs to be explicitly shown that they are decimal numbers.
Binary:
0b111 – It is possible to omit the “0b” when the number of bit can be distinctly
understood from a sentence.
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“_N” is added to the end of signal names to indicate low active signals.
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It is called “assert” that a signal moves to its active level, “deassert” to its inactive level.
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When two or more signal names are referred, they are described like as [m: n].
Example: S[3: 0] shows four signal names S3, S2, S1 and S0 together.
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The characters surrounded by
[ ]
defines the register.
Example:
[ABCD]
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“n” substitutes suffix number of two or more same kind of registers, fields, and bit names.
Example:
[XYZ1], [XYZ2], [XYZ3]
[XYZn]
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"x" substitutes suffix number or character of units and channels in the Register List.
In case of unit, “x” means A, B, and C . . .
Example:
[ADACR0], [ADBCR0], [ADCCR0]
[ADxCR0]
In case of channel, “x” means 0, 1, and 2 . . .
Example:
[
T32A0RUNA], [T32A1RUNA], [T32A2RUNA]
[T32AxRUNA]
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The bit range of a register is written like as [m: n].
Example: Bit[3: 0] expresses the range of bit 3 to 0.
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The configuration value of a register is expressed by either the hexadecimal number or the binary number.
Example:
[ABCD]
<EFG> = 0x01 (hexadecimal),
[XYZn]
<VW> = 1 (binary)
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Word and Byte represent the following bit length.
Byte:
8 bits
Half word: 16 bits
Word:
32 bits
Double word: 64 bits
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Properties of each bit in a register are expressed as follows:
R:
Read only
W:
Write only
R/W:
Read and Write are possible
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Unless otherwise specified, register access supports only word access.
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The register defined as reserved must not be rewritten. Moreover, do not use the read value.
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The value read from the bit having default value of "-" is unknown.
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When a register containing both of writable bits and read-only bits is written, read-only bits should be
written with their default value, In the cases that default is “-“, follow the definition of each register.
●
Reserved bits of the Write-only register should be written with their default value. In the cases that default is
“-“, follow the definition of each register.
●
Do not use read-modified-write processing to the register of a definition which is different by writing and
read out.
