HD404449 Datasheet, PDF (77/125 Pages) Hitachi Semiconductor – HD404449 SERIES

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
HD404449 Series
TMD13
0
1
Free-running/reload timer selection
Free-running timer
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
R4₀/EVND (External event input)
Figure 59 Timer Mode Register D1 (TMD1)
• Timer write register D (TWDL: $011, TWDU: $012): Write-only register consisting of a lower digit
(TWDL) and an upper digit (TWDU) as shown in figures 61 and 62. The operation of timer write
register D is basically the same as that of timer write register B (TWBL: $00A, TWBU: $00B).
• Timer read register D (TRDL: $011, TRDU: $012): Read-only register consisting of a lower digit
(TRDL) and an upper digit (TRDU) as shown in figures 63 and 64. The operation of timer read register
D is basically the same as that of timer read register B (TRBL: $00A, TRBU: $00B).
When the input capture timer operation is selected and if the count of timer D is read after a trigger is
input, either the lower or upper digit can be read first.
• Port mode register C (PMRC: $025): Write-only register that selects R4₀/EVND pin function as shown
in figure 50. It is reset to $0 by MCU reset.
• Detection edge select register 2 (ESR2: $027): Write-only register that selects the detection edge of
signals input to pin EVND as shown in figure 65. It is reset to $0 by MCU reset.
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