APPENDIX
Appendix 1. Memory assigment in SFR area
Appendix 1. Memory assigment in SFR area
■ SFR area (Addresses 016 to FF16
)
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.”
Address
Register name
Access characteristics
State immediately after reset
b7
b0
b7
b0
(Note 1)
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
10 16
11 16
12 16
13 16
14 16
15 16
16 16
17 16
18 16
19 16
1A16
1B16
1C16
1D16
1E16
1F16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
?
?
(Note 1)
(Note 2)
RW
(Note 2)
RW
RW
(Note 2)
RW
?
?
Port P1 register
?
0016
?
Port P1 direction register
Port P2 register
?
0016
?
Port P2 direction register
Port P5 register
(Note 2)
(Note 2)
RW
?
?
0
?
?
?
(Note 2)
RW
?
Port P5 direction register
Port P6 register
0
0
0
?
RW
RW
RW
RW
?
?
?
Port P7 register
?
0
0
Port P6 direction register
Port P7 direction register
0
0
0
0
0
0
0
0
(Note 2)
?
?
?
?
(Note 2)
(Note 2)
(Note 2)
(Note 2)
(Note 2)
?
?
?
?
?
?
?
?
A-D control register 0
A-D control register 1
RW
RW
0
0
0
0
0
0
0
0
0
0
?
0
?
?
?
?
Notes 1: Do not read from and write to this register.
2: Do not write to this register.
7906 Group User’s Manual Rev.2.0
20-2
RENESAS [ RENESAS TECHNOLOGY CORP ]
