E202075_HD404889 Datasheet, PDF (111/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Timer write register D (upper) (TWDU: $01B)
Bit
Read/Write
Initial value on reset
Bit name
3
2
1
0
W
W
W
W
Undetermined Undetermined Undetermined Undetermined
TWDU3 TWDU2 TWDU1 TWDU0
Figure 59 Timer Write Register D (Upper) (TWDU)
• Timer read register D (TRDL: $01A, TRDU: $01B):
Timer read register D (TRDL, TRDU) is a read-only register composed of a lower digit (TRDL) and an
upper digit (TRDU) (figures 60 and 61).
Timer read register D (TRDL, TRDU) operation is similar to that for timer read register B (TRBL,
TRBU).
In the input capture timer operating mode, when the timer D value is read after trigger input, it does not
matter whether the lower or upper digit is read first.
Timer read register D (lower) (TRDL: $01A)
Bit
Read/Write
Initial value on reset
Bit name
3
2
1
0
R
R
R
R
Undetermined Undetermined Undetermined Undetermined
TRDL3 TRDL2 TRDL1 TRDL0
Figure 60 Timer Read Register D (Lower) (TRDL)
Timer read register D (upper) (TRDU: $01B)
Bit
Read/Write
Initial value on reset
Bit name
3
2
1
0
R
R
R
R
Undetermined Undetermined Undetermined Undetermined
TRDU3 TRDU2 TRDU1 TRDU0
Figure 61 Timer Read Register D (Upper) (TRDU)
109