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參數(shù)資料
| 型號(hào)： | HD404812 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
| 中文描述： | 4位單片機(jī)（4位單片微計(jì)算機(jī)） |
| 文件頁數(shù)： | 53/98頁 |
| 文件大?。?/td> | 621K |
| 代理商： | HD404812 |
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HD404818 Series
53
5. The division ratio must not be modified during time base mode operation, otherwise an overflow
cycle error will occur.
Timer Mode Register C (TMC: $00D):
Timer mode register C is a 4-bit write-only register which selects
the auto-reload function, input clock source, and prescaler divide ratio, as table 23 shows. Timer mode
register C is initialized to $0 at MCU reset.
The contents of timer mode register C will change in the second instruction cycle after a write instruction to
TMC. Therefore, it is required to initialize timer C after the contents of timer mode register C have been
changed completely.
Timer B (TCBL: $00A, TCBU: $00B, TLRL: $00A, TLRU: $00B):
Timer B consists of an 8-bit write-
only timer load register, and an 8-bit read-only timer counter. Each of them has low-order digits (TCBL:
$00A, TLRL: $00A) and high-order digits (TCBU: $00B, TLRU: $00B). (Refer to figure 26.)
Timer counter B can be initialized by writing data into timer load register B. In this case, write the low-
order digits first, and then the high-order digits. The timer counter is initialized when the high-order digit
is written. The timer load register is initialized to $00 by MCU reset.
The counter value of timer B can be obtained by reading timer counter B. In this case, read the high-order
digits first, and then the low-order digits. The count value of the low-order digit is obtained when the high-
order digit is read.
Timer C (TCCL: $00E, TCCU: $00F, TCRL: $00E, TCRU: $00F):
Timer C consists of the 8-bit write-
only timer load register and the 8-bit read-only timer counter. These individually consist of low-order digits
(TCCL: $00E, TCRL: $00E) and high-order digits (TCCU: $00F, TCRU: $00F). The operation mode of
timer C is the same as that of timer B.
Table 22 Timer Mode Register B
TMB3
Auto-Reload Function
0
No
1
Yes
TMB2
TMB1
TMB0
Prescaler Divide Ratio, Clock Input Source
0
0
0
÷
2048
÷
512
÷
128
÷
32
÷
8
÷
4
÷
2
INT
1
(external event input)
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
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| HD40L4816 | 4-Bit Single-Chip Microcomputer(4位單片微計(jì)算機(jī)) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD404812FS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404812H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404812TF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404814 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD404814FS | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
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