HD404849 Datasheet, PDF (76/127 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

Timer mode register D1 (TMD1: $010)
Bit
Initial value
Read/Write
Bit name
3
0
W
TMD13
2
0
W
TMD12
1
0
W
TMD11
0
0
W
TMD10
HD404849 Series
TMD13 Free-running/reload timer selection
0
Free-running timer
1
Reload timer
TMD12 TMD11 TMD10
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Input clock period and
input clock source
2048t_cyc
512t_cyc
128t_cyc
32t_cyc
8t_cyc
4t_cyc
2t_cyc
R2₀/EVND (external event input)
Figure 59 Timer Mode Register D1 (TMD1)
• Timer mode register D2 (TMD2: $015): Four-bit read/write register that selects the timer D output
mode and input capture operation as shown in figure 60. It is reset to $0 by MCU reset.
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