HD404669 Datasheet, PDF (73/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
Timer mode register D2 (TMD2: $015): Timer mode register D2 (TMD2: $015) is a 4-bit read/write
register, used to switch the function of the R3₂/TOD pin and select the timer D output mode as shown in
figure 51. Timer mode register D2 (TMD2: $015) is reset to $0 by an MCU reset and in stop mode.
Timer mode register D2 (TMD2: $015)
Bit
3
2
1
0
Initial value
0
0
0
0
Read/Write
R/W
R/W
R/W
R/W
Bit name
TMD23 TMD22 TMD21 TMD20
TMD23 TMD22 TMD21 TMD20
0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
1
×
×
×
× : Don’t care
R3₂/TOD mode selection
R3₂
R3₂ port
TOD Toggle output
TOD 0 output
TOD 1 output
—
Not used
TOD
R3₂
PWM output
Input capture (R3₂ port)
Figure 51 Timer Mode Register D2 (TMD2)
Timer write register D (TWDL: $011, TWDU: $012): Write-only register consisting of the lower digit
(TWDL: $011) and the upper digit (TWDU: $012). The operation of timer write register D is basically the
same as that of timer write register C (TWCL: $00E, TWCU: $00F).
Timer write register D (lower digit) (TWDL: $011)
Bit
Initial value
Read/Write
Bit name
3
0
W
TWDL3
2
0
W
TWDL2
1
0
W
TWDL1
0
0
W
TWDL0
Figure 52 Timer Write Register D Lower Digit (TWDL)
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