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參數(shù)資料
| 型號： | HD404654S |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 59/109頁 |
| 文件大小： | 430K |
| 代理商： | HD404654S |
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HD404654 Series
59
Registers for Timer D Operation:
By using the following registers, timer D operation modes are selected
and the timer D count is read and written.
Timer mode register D1 (TMD1: $010)
Timer mode register D2 (TMD2: $015)
Timer write register D (TWDL: $011, TWDU: $012)
Timer read register D (TRDL: $011, TRDU: $012)
Port mode register C (PMRC: $025)
Detection edge select register 2 (ESR2: $027)
Timer mode register D1 (TMD1: $010): Four-bit write-only register that selects the free-
running/reload timer function, input clock source, and the prescaler division ratio as shown in figure 44.
It is reset to $0 by MCU reset.
Writing to this register is valid from the second instruction execution cycle after the execution of the
previous timer mode register D1 (TMD1: $010) write instruction. Setting timer D’s initialization by
writing to timer write register D (TWDL: $011, TWDU: $012) must be done after a mode change
becomes valid.
When selecting the input capture timer operation, select the internal clock as the input clock source.
Bit
Initial value
Read/Write
Bit name
3
0
W
TMD13
2
0
W
TMD12
0
0
W
TMD10
1
0
W
TMD11
Timer mode register D1 (TMD1: $010)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2048t
cyc
512t
cyc
128t
cyc
32t
cyc
8t
cyc
4t
cyc
2t
cyc
TMD12
TMD10
TMD11
Input clock period and
input clock source
R4
0
/EVND (external event input)
TMD13
0
1
Free-running/reload timer selection
Free-running timer
Reload timer
Figure 44 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 45. It is reset to $0 by MCU reset.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HD404654SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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| HD404668H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
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