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參數(shù)資料
| 型號(hào)： | HCD404082 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| 中文描述： | 低電壓如同在微機(jī)芯片的A / D轉(zhuǎn)換器（帶片上的A / D轉(zhuǎn)換器的低壓微計(jì)算機(jī)） |
| 文件頁(yè)數(shù)： | 71/162頁(yè) |
| 文件大?。?/td> | 482K |
| 代理商： | HCD404082 |
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HD404374/HD404384/HD404389/HD404082/HD404084 Series
71
1/4
1/2
32.768-kHz
oscillator
System
clock
Data bus
Clock line
Signal line
Prescaler W
(PSW)
Selector
Selector
Prescaler S (PSS)
S
I
Timer A interrupt
request flag
(IFTA)
Clock
Overflow
Timer
counter A
(TCA)
Timer mode
register A
(TMA)
3
2 f
1/2 t
Wcyc
f
t
Wcyc
PER
2
÷
4
÷
8
÷
3
÷
1
÷
5
÷
1
÷
2
÷
2
÷
8
÷
1
÷
3
÷
W
W
HD404374 Series
Figure 32 Timer A Block Diagram
Timer A Operation
Free-running timer operation:
The timer A input clock is selected by timer mode register A (TMA: $00F).
Timer A is reset to $00 by an MCU reset, and counts up each time the input clock is input. When the input
clock is input after the timer A value reaches $FF, overflow output is generated, and the timer A value
becomes $00. The generated overflow output sets the timer A interrupt request flag (IFTA: $002,0). Timer
A continues counting up after the count value returns to $00, so that an interrupt is generated regularly
every 256 input clock cycles.
Realtime clock time base operation (HD404374 Series):
Timer A can be used as the realtime clock time base by setting bit 3 (TMA3) of timer mode register A to 1.
As the prescaler W output is input to timer/counter A, interrupts are generated with accurate timing using
the 32.768 kHz crystal oscillator as the basic clock.
When timer A is used as the realtime clock time base, prescaler W and timer/counter A can be reset to $00
by the program.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HCD404084 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HCD40C4084 | Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計(jì)算機(jī)) |
| HCD40C4344R | 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī)) |
| HCD44780UBxx | 320 x 240 pixel format, CFL backlight available with power harness |
| HCD44780UA00 | 320 x 240 pixel format, CFL backlight available with power harness |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCD404344R | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers |
| HCD404669 | 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 |
| HCD404889 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Low-Voltage AS Microcomputers with On-Chip LCD Circuit |
| HCD40C4344R | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-bit microcomputers |
| HCD44780UA00 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller/Driver |
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