SH7206 Datasheet, PDF (8/1188 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

• Description of Registers
Each register description includes a bit chart, illustrating the arrangement of bits, and a table of
bits, describing the meanings of the bit settings. The standard format and notation for bit charts
and tables are described below.
[Bit Chart]
Bit: 15 14 13 12 11 10

 ASID2 ASID1 ASID0 
Initial value: 0
0
0
0
0
0
R/W: R/W R/W R/W R/W R/W R
9
8
7
6
5
4
3
2
1
0





Q ACMP2 ACMP1 ACMP0 IFE
1
0
0
0
0
0
0
0
0
0
R R/W R/W R/W R/W R/W R/W R/W R/W R/W
[Table of Bits] ⁽¹⁾
Bit
15
14
13 to 11
10
9
(2)
(3)
(4)
(5)
Bit Name
−
−
Initial Value R/W
0
R
0
R
Description
Reserved
These bits are always read as 0.
ASID2 to All 0
ASID0
R/W Address Identifier
These bits enable or disable the pin function.
−
0
R Reserved
This bit is always read as 0.
−
1
R Reserved
This bit is always read as 1.
−
0
Note: The bit names and sentences in the above figure are examples, and have nothing to do with the contents of this
manual.
(1) Bit
Indicates the bit number or numbers.
In the case of a 32-bit register, the bits are arranged in order from 31 to 0. In the case
of a 16-bit register, the bits are arranged in order from 15 to 0.
(2) Bit name
Indicates the name of the bit or bit field.
When the number of bits has to be clearly indicated in the field, appropriate notation is
included (e.g., ASID[3:0]).
A reserved bit is indicated by "−".
Certain kinds of bits, such as those of timer counters, are not assigned bit names. In such
cases, the entry under Bit Name is blank.
(3) Initial value
Indicates the value of each bit immediately after a power-on reset, i.e., the initial value.
0: The initial value is 0
1: The initial value is 1
−: The initial value is undefined
(4) R/W
For each bit and bit field, this entry indicates whether the bit or field is readable or writable,
or both writing to and reading from the bit or field are impossible.
The notation is as follows:
R/W: The bit or field is readable and writable.
R/(W): The bit or field is readable and writable.
However, writing is only performed to flag clearing.
R: The bit or field is readable.
"R" is indicated for all reserved bits. When writing to the register, write
the value under Initial Value in the bit chart to reserved bits or fields.
W: The bit or field is writable.
(5) Description
Describes the function of the bit or field and specifies the values for writing.
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Rev. 3.00 Jun. 18, 2008 Page viii of xxiv