How to Use This Manual
This hardware manual provides detailed information on the R8C/14 Group, R8C/15 Group of
Users are expected to have basic knowledge of electric circuits, logical circuits and microcomputers.
2. Register Diagram
The symbols, and descriptions, used for bit function in each register are shown below.
b7 b6 b5 b4 b3 b2 b1 b0
XXX0 XXX Bit
1 0: XXX
0 1: XXX
1 0: Avoid this setting
1 1: XXX
Nothing is assigned.
When write, should set to “0”. When read, its content is indeterminate.
Must set to “0”
Function varies depending on each operation RW
Blank:Set to “0” or “1” according to the application
0: Set to “0”
1: Set to “1”
X: Nothing is assigned
RW: Read and write
RO: Read only
WO: Write only
−: Nothing is assigned
Reserved bit. Set to specified value.
•Nothing is assigned
Nothing is assigned to the bit concerned. As the bit may be use for future functions,
set to “0” when writing to this bit.
•Do not set to this value
The operation is not guaranteed when a value is set.
•Function varies depending on mode of operation
Bit function varies depending on peripheral function mode.
Refer to respective register for each mode.
Follow the text in each manual for binary and hexadecimal notations.