參數(shù)資料
型號: HD40A4669
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 63/142頁
文件大小: 894K
代理商: HD40A4669
HD404669 Series
63
T (N + 1)
T 256
T
T (256 – N)
TMC13 = 0
TMD13 = 0
(free-running timer)
TMC13 = 1
TMD13 = 1
(reload timer)
256 clock cycles
256 clock cycles
Free-running timer
Toggle output waveform (timers C and D)
PWM output waveform (timers C and D)
(256 – N) clock cycles (256 – N) clock cycles
Reload timer
Notes: T:
N:
Counter input clock period
The clock input source and division ratio are controlled by
timer mode register C1 and timer mode register D1.
Value in timer write register C or timer write register D
(When N = 255 (= $FF), PWM output is always fixed low.)
Figure 42 Timer Output Waveforms
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HD404668 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
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