M16C30P_07 Datasheet, PDF (6/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

3. Register Notation
The symbols and terms used in register diagrams are described below.
XXX Register
*1
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol
Address
After Reset
*5
XXX
XXX
00h
Bit Symbol
Bit Name
XXX0 ^{XXX Bit}
XXX1
Function
b1 b0
1 0: XXX
0 1: XXX
1 0: Avoid this setting
1 1: XXX
RW
*2
RW
RW
Nothing is assigned.
(b2)
When write, should set to “0”. When read, its content is indeterminate.
*3
(b3)
Reserved Bit
Must set to “0”
RW _*4
XXX4
XXX Bit
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: Nothing is assigned.
*2
RW: Read and write.
RO: Read only.
WO: Write only.
−: Nothing is assigned.
*3
• Reserved bit
Reserved bit. Set to specified value.
*4
• Nothing is assigned
Nothing is assigned 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.