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參數(shù)資料
| 型號： | HD404654 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | RESISTOR, 0.10 OHM 5W |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 51/109頁 |
| 文件大小： | 430K |
| 代理商： | HD404654 |
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HD404654 Series
51
The overflow sets the timer C interrupt request flag (IFTC: $002, bit 2). IFTC is reset by software or
MCU reset. Refer to figure 3 and table 1 for details.
Watchdog timer operation: Timer C is used as a watchdog timer for detecting out-of-control program
routines by setting the watchdog on flag (WDON: $020, bit 1) to 1. If a program routine runs out of
control and an overflow is generated, the MCU is reset. Program run can be controlled by initializing
timer C by software before it reaches $FF.
Timer output operation: The following four output modes can be selected for timer C by setting timer
mode register C2 (TMC2: $014).
Toggle
0 output
1 output
PWM output
By selecting the timer output mode, pin R3
1
/TOC is set to TOC. The output from TOC is reset low by
MCU reset.
Toggle output: When toggle output mode is selected, the output level is inverted if a clock is input
after timer C has reached $FF. By using this function and the reload timer function, clock signals
can be output at a required frequency for the buzzer. The output waveform is shown in figure 36.
PWM output: When PWM output mode is selected, timer C provides the variable-duty pulse output
function. The output waveform differs depending on the contents of timer mode register C1
(TMC1: $00D) and timer write register C (TWCL: $00E, TWCU: $00F). The output waveform is
shown in figure 36.
0 output: When 0 output mode is selected, the output level is pulled low if a clock is input after
timer C has reached $FF. Note that this function must be used only when the output level is high.
1 output: When 1 output mode is selected, the output level is set high if a clock is input after timer
C has reached $FF. Note that this function must be used only when the output level is low.
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| HD404654H | 4-Bit Single-Chip Microcomputer |
| HD404654S | 4-Bit Single-Chip Microcomputer |
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相關(guān)代理商/技術(shù)參數(shù) |
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| HD404654S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit Single-Chip Microcomputer |
| 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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| HD4046612H | 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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