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參數(shù)資料
| 型號(hào)： | HD40A4054 |
| 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)： | 45/101頁 |
| 文件大?。?/td> | 610K |
| 代理商： | HD40A4054 |
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HD404054 Series/HD404094 Series
45
Timers
The MCU has three timer/counters (A, C, and D).
Timer A: Free-running timer
Timer C: Multifunction timer
Timer D: Multifunction timer
Timer A is an 8-bit free-running timer. Timers C and D are 8-bit multifunction timers, whose functions are
listed in table 23. The operating modes are selected by software.
Timer A
Timer A Functions:
Timer A has the following functions.
Free-running timer
The block diagram of timer A is shown in figure 30.
Timer A Operations:
Free-running timer operation: The input clock for timer A is selected by timer mode register A (TMA:
$008).
Timer A is reset to $00 by MCU reset and incremented at each input clock. If an input clock is applied
to timer A after it has reached $FF, an overflow is generated, and timer A is reset to $00. The overflow
sets the timer A interrupt request flag (IFTA: $001, bit 2). Timer A continues to be incremented after
reset to $00, and therefore it generates regular interrupts every 256 clocks.
Registers for Timer A Operation:
Timer A operating modes are set by the following registers.
Timer mode register A (TMA: $008): Four-bit write-only register that selects timer A’s operating mode
and input clock source as shown in figure 31.
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| HD40A4358 | 4-bit HMCS400-Series microcomputer |
| HD404354 | 4-bit HMCS400-Series microcomputer |
| HD404354H | 4-bit HMCS400-Series microcomputer |
| HD404354S | 4-bit HMCS400-Series microcomputer |
| HD404356 | 4-bit HMCS400-Series microcomputer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD40A4054H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory |
| HD40A4054S | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:HMCS400-series microcomputers designed to increase program productivity with large-capacity memory |
| HD40A4081FT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD40A4081H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| HD40A4081S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
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