Before Use
• Guide to Understanding the Register Table
(1) Bit number: Indicates a register’s bit number.
(2) Register border: The registers enclosed with thick border lines must be accessed in halfwords or words.
(3) Status after reset: The initial state of each register after reset is indicated in hexadecimal or binary.
(4) Status after reset: The initial state of each register after reset is indicated bitwise.
0: This bit is “0” after reset.
1: This bit is “1” after reset.
?: This bit is undefined after reset.
(5) The shaded bits mean that they have no functions assigned.
(6) Read conditions:
R: This bit can be accessed for read.
?: The value read from this bit is undefined. (Reading this bit has no effect.)
0: The value read from this bit is always “0”.
1: The value read from this bit is always “1”.
(7) Write conditions:
W: This bit can be accessed for write.
N: This bit is write protected.
0: To write to this bit, always write “0”.
1: To write to this bit, always write “1”.
–: Writing to this bit has no effect. (It does not matter whether this bit is set to “0” or “1” by writing in software.)
Note: Care must be taken when writing to this bit. See Note in each register table.
(1)
XXXRegister(XXX)
<Address: H’XXXX XXXX>
(5)
b0
1
2
3
0
4
0
5
0
6
0
7
0
8
0
9
0
10
0
11
0
12
13
0
14
0
b15
0
(2)
(4)
AAA
0
BBB
0
CCC
0
0
(3)
<After reset: H’0000>
b
0
Bit name
AAA
Function
R
R
W
W
0 :
1 :
•
•
•
•
•
•
•
•
•
•
•
•
bit
bit
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
bit
bit
bit
•
•
•
•
•
•
1
2
BBB
0 :
1 :
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
bit
bit
R
W
•
•
•
• •
CCC
0 :
1 :
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
bit
bit
R (Note 1)
•
•
•
• •
3–15
No function assigned. Fix to “0”.
0
0
Note 1: Only writing “0” is effective. Writing “1” has no effect, in which case the bit retains the value it had before the write.
(6) (7)
• Notation of active-low pins (signals)
The symbol “#” suffixed to the pin (or signal) names means that the pins (or signals) are active-low.
RENESAS [ RENESAS TECHNOLOGY CORP ]
