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.”
Address
Register name
Access characteristics
RW
State immediately after reset
b7
b0
b7
b0
0016
?
0016
Pulse output control register
A016
A116
A216
A316
A416
A516
A616
A716
A816
A916
AA16
AB16
AC16
AD16
AE16
AF16
B016
B116
B216
B316
B416
B516
B616
B716
B816
B916
BA16
BB16
BC16
BD16
BE16
BF16
Pulse output data register 0
Pulse output data register 1
RW
RW
?
0016
?
Waveform output mode register
Dead-time timer
RW
WO
RW
RW
0016
?
0016
Three-phase output data register 0
Three-phase output data register 1
0016
Position-data-retain function control register
0
?
0
0
0
0
0
0
0
RW RO RO RO
RW RW RW RW
RW RW RW
?
Serial I/O pin control register
0
0
0
0
0
0
0
RW RW
?
Port P2 pin function control register
0
RW
?
?
?
?
?
RW
WO
WO
UART2 transmit/receive mode register
UART2 baud rate register (BRG2)
0016
?
?
?
UART2 transmit buffer register
WO
RW
RO
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
RW
RO
RO
RW
RO
UART2 transmit/receive control register 0
UART2 transmit/receive control register 1
RW
0
?
RO
UART2 receive buffer register
0
0
0
0
0
0
?
0
(Note 16)
?
?
?
?
(Note 16)
(Note 16)
Clock control register 0
1
1
1
1
0
0
0
0
RW RW RW RW(Note 17)RW RW
(Note 16)
?
?
?
(Note 16)
(Note 16)
Notes 16 : Do not write to this register.
17 : After reset, these bits are allowed to be changed only once.
7905 Group User’s Manual Rev.1.0
20-7
RENESAS [ RENESAS TECHNOLOGY CORP ]
