How to Use This Manual
This hardware manual provides detailed information on the M16C/6N Group (M16C/6NL, M16C/6NN) 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
0 0: XXX
0 1: XXX
1 0: Do not set a value
1 1: XXX
Nothing is assigned. When write, set to "0",
(b2) When read, its content is indeterminate.
Set to "0"
Function varies depending on
mode of operation
XXX7 XXX Bit
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
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.