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- 您現(xiàn)在的位置:買賣IC網(wǎng) > PDF目錄98068 > S1C63455F 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP128 PDF資料下載
參數(shù)資料
型號(hào):
S1C63455F
元件分類:
微控制器/微處理器
英文描述:
4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP128
封裝:
PLASTIC, QFP5-128
文件頁數(shù):
103/119頁
文件大?。?/td>
865K
代理商:
S1C63455F
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76EPSONS1C63455 TECHNICAL MANUALCHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Sound Generator)Level 1 (Max.)Level 2Level 3Level 4Level 5Level 6Level 7Level 8 (Min.)TH TLLevel 1 (Max.)Level 2Level 3Level 4Level 5Level 6Level 7Level 8 (Min.)TL TH(a) Negative polarity(b) Positive polarityFig. 4.12.4.1 Duty ratio of the buzzer signal waveformNote: When a digital envelope has been added to the buzzer signal, the BDTY0–BDTY2 settings will beinvalid due to the control of the duty ratio.4.12.5 Digital envelopeA digital envelope for duty control can be added to the buzzer signal.The envelope can be controlled by staged changing of the same duty envelope as detailed in Table4.12.4.2 in the preceding item from level 1 (maximum) to level 8 (minimum).The addition of an envelope to the buzzer signal can be done by writing "1" into ENON, but when "0" hasbeen written it is not added.When a buzzer signal output is begun (writing "1" into BZE) after setting ENON, the duty ratio shifts tolevel 1 (maximum) and changes in stages to level 8.When attenuated down to level 8 (minimum), it is retained at that level. The duty ratio can be returned tomaximum, by writing "1" into register ENRST during output of a envelope attached buzzer signal.The envelope attenuation time (time for changing of the duty ratio) can be selected by the registerENRTM. The time for a 1 stage level change is 62.5 msec (16 Hz), when "0" has been written into ENRTMand 125 msec (8 Hz), when to "1" has been written. However, there is also a max. 4 msec error fromenvelope ON, up to the first change.Figure 4.12.5.1 shows the timing chart of the digital envelope.BZFQ0–2ENONENRSTENRTMBZEt01t02t03t04t05t06t07t01t11t12t13t14t15t16t17Level 1 (Max.)2345678 (Min.)BZ signalduty ratioNo change of duty levelt01t02–07= 62.5msec= 62.5 msec+0–4t11t12–17= 125msec= 125 msec+0–4Fig. 4.12.5.1 Timing chart for digital envelope
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