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CHAPTER 3 CPU ARCHITECTURE
User’s Manual U19780EJ2V0UD
65
Table 3-6. Special Function Register List (3/4)
Manipulatable Bit Unit
Address
Special Function Register (SFR) Name
Symbol
R/W
1 Bit
8 Bits
16 Bits
After
Reset
30-pin
products
48-pin
products
FF68H
Multiplier/divider control register 0
DMUC0 R/W
√
√
−
00H
√
√
FF69H
8-bit timer H mode register 0
TMHMD0 R/W
√
√
−
00H
√
√
FF6AH
Timer clock selection register 50
TCL50 R/W
√
√
−
00H
√
√
FF6BH
8-bit timer mode control register 50
TMC50 R/W
√
√
−
00H
√
√
FF6CH
8-bit timer H mode register 1
TMHMD1 R/W
√
√
−
00H
√
√
FF6DH
8-bit timer H carrier control register 1
TMCYC1 R/W
√
√
−
00H
√
√
FF6EH
Key return mode register
KRM R/W
√
√
−
00H
−
√
FF70H
FF71H
Sub-count register
RSUBC R
−
−
√
0000H
−
√
FF72H
Second count register
SEC R/W
−
√
−
00H
−
√
FF73H
Minute count register
MIN R/W
−
√
−
00H
−
√
FF74H
Hour count register
HOUR R/W
−
√
−
12H
Note1
−
√
FF75H
Week count register
WEEK R/W
−
√
−
00H
−
√
FF76H
Day count register
DAY R/W
−
√
−
01H
−
√
FF77H
Month count register
MONTH R/W
−
√
−
01H
−
√
FF78H
Year count register
YEAR R/W
−
√
−
00H
−
√
FF79H
Watch error correction register
SUBCUD R/W
−
√
−
00H
−
√
FF7AH
Alarm minute register
ALARMWM R/W
−
√
−
00H
−
√
FF7BH
Alarm hour register
ALARMWH R/W
−
√
−
12H
−
√
FF7CH
Alarm week register
ALARMWW R/W
−
√
−
00H
−
√
FF7DH
Real-time counter control register 0
RTCC0 R/W
√
√
−
00H
−
√
FF7EH
Real-time counter control register 1
RTCC1 R/W
√
√
−
00H
−
√
FF7FH
Real-time counter control register 2
RTCC2 R/W
√
√
−
00H
−
√
FF80H
Serial operation mode register 10
CSIM10 R/W
√
√
−
00H
√
√
FF81H
Serial clock selection register 10
CSIC10 R/W
√
√
−
00H
√
√
FF84H
Transmit buffer register 10
SOTB10 R/W
−
√
−
00H
√
√
FF8CH
Timer clock selection register 51
TCL51 R/W
√
√
−
00H
√
√
FF99H
Watchdog timer enable register
WDTE R/W
−
√
−
1AH/
9AH
Note 2
√
√
FF9FH
Clock operation mode select register
OSCCTL R/W
√
√
−
00H
√
√
FFA0H
Internal oscillation mode register
RCM R/W
√
√
−
80H
Note 3
√
√
FFA1H
Main clock mode register
MCM R/W
√
√
−
00H
√
√
FFA2H
Main OSC control register
MOC R/W
√
√
−
80H
√
√
FFA3H
Oscillation stabilization time counter status
register
OSTC R
√
√
−
00H
√
√
FFA4H
Oscillation stabilization time select register
OSTS R/W
−
√
−
05H
√
√
Notes 1.
The value of this register is 00H if the AMPM bit (bit 3 of the RTCC0 register) is set to 1 after reset.
2.
The reset value of WDTE is determined by setting of option byte.
3.
The value of this register is 00H immediately after a reset release but automatically changes to 80H after
oscillation accuracy stabilization of high-speed internal oscillator has been waited.