M32C8A Datasheet, PDF (6/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

3. Register Notation
The symbols and terms used in register diagrams are described below.
XXX Register
b7 b6 b5 b4 b3 b2 b1 b0
0
*1
Symbol
XXX
Address
XXX
After Reset
00h
Bit Symbol
Bit Name
XXX0 ^{XXX bits}
XXX1
Function
b1 b0
1 0: XXX
0 1: XXX
1 0: Do not set to this value
1 1: XXX
RW
*2
RW
RW
Unimplemented.
(b2)
Write 0. Read as undefined value.
*3
(b3)
Reserved bit
Set to 0
RW _*4
XXX4
XXX bits
Function varies depending on each operation _RW
mode
XXX5
WO
XXX6
RW
XXX7
XXX bit
0: XXX
RO
1: XXX
*1
Blank: Set to 0 or 1 according to the application.
0: Set to 0.
1: Set to 1.
X: Unimplemented.
*2
RW: Read and write.
RO: Read only.
WO: Write only.
−: Unimplemented.
*3
• Reserved bit
Reserved bit. Set to specified value.
*4
• Unimplemented
Nothing is implemented to the bit. As the bit may be used for future functions, if necessary, set to 0.
• Do not set to a value
Operation is not guaranteed when a value is set.
• Function varies according to the operating mode.
The function of the bit varies with the peripheral function mode. Refer to the register diagram for information
on the individual modes.