APPENDIX
Appendix 1. Memory assigment in SFR area
Access characteristics
: It is possible to read the bit state at reading. The written value becomes valid.
: It is possible to read the bit state at reading. The written value becomes invalid.
: The written value becomes valid. It is impossible to read the bit state.
RW
RO
WO
: Nothing is assigned. It is impossible to read the bit state. The written value becomes invalid.
State immediately after reset
: “0” immediately after reset.
: “1” immediately after reset.
: Undefined immediately after
reset.
0
1
?
: Always “0” at reading.
0
1
?
0
: Always “1” at reading.
: Always undefined at reading.
: “0” immediately after reset. Fix this bit to “0.”
Register name
Address
Access characteristics
State immediately after reset
b7
b0
b7
b0
?
?
?
C016
C116
C216
C316
C416
C516
C616
C716
C816
C916
CA16
CB16
CC16
CD16
CE16
CF16
D016
D116
D216
D316
D416
D516
D616
D716
D816
D916
DA16
DB16
DC16
DD16
DE16
DF16
?
RW
WO
Up-down register 1
0
0
0
0
0
0
0
0
?
RW
RW
RW
RW
RW
RW
RW
RW
?
?
?
?
?
?
Timer A5 register
Timer A6 register
Timer A7 register
Timer A8 register
Timer A9 register
?
?
?
?
?
?
?
?
?
?
(Note 19)
(Note 19)
WO
Timer A0
1
register
WO
WO
Timer A1
1
1
register
register
WO
WO
Timer A2
WO
RW
RW
RW
RW
RW
0016
Timer A5 mode register
Timer A6 mode register
Timer A7 mode register
Timer A8 mode register
Timer A9 mode register
0016
0016
0016
0016
(Note 20)
RW
(Note 20)
RW
?
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Comparator function select register 0
Comparator result register 0
?
?
0
0
(Note 20)
Notes 19: The access characteristics at addresses CE16 and CF16 vary according to the timer A’s operating mode.
(Refer to “CHAPTER 7. TIMER A.”)
20: Do not write to this register.
7906 Group User’s Manual Rev.2.0
20-8
RENESAS [ RENESAS TECHNOLOGY CORP ]
