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參數(shù)資料
| 型號(hào)： | S1C6S460D |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC124 |
| 封裝： | 4.69 X 4.68 MM, DIE-124 |
| 文件頁(yè)數(shù)： | 84/107頁(yè) |
| 文件大?。?/td> | 788K |
| 代理商： | S1C6S460D |
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70
EPSON
S1C6S460 TECHNICAL MANUAL
CHAPTER 10: SOUND GENERATOR
BZFQ0–2
ENON
ENVRST
ENVRT
R43 (register)
t01
t02
t03
t04
t05
t06
t07
t01
t11
t12
t13
t14
t15
t16
t17
Level 1 (MAX)
2
3
4
5
6
7
8 (MIN)
BZ signal
duty ratio
No change of duty level
t01
t02–07
= 62.5
msec
= 62.5 msec
+0
–4
t11
t12–17
= 125
msec
= 125 msec
+0
–4
Fig. 10.4.1 Digital envelope timing chart
10.5 1-shot Output
In order to cause the buzzer to ring in a short period of time as in the case of key operation check sound,
1-shot output function is built-in. The time duration for buzzer signal to be output (BZ and BZ) may be
selected by SHOTPW; when "0" is written on SHOTPW, it is set to 31.25 ms and to 62.5 ms when "1"
written.
Actual output operation is performed by writing "1" on BZSHOT; after performing the previously
described writing operation, it synchronizes with the internal 256 Hz signal and buzzer signal is output
in output port R43 (R42).
Moreover, after the set time has lapsed, it synchronizes with the same 256 Hz previously described and
the buzzer signal is automatically turned off. Also, by reading BZSHOT, whether the 1-shot circuit is in
operation or not may be determined with the software.
Figure 10.5.1 shows the timing chart of the 1-shot output.
256 Hz
SHOTPW
BZSHOTW
(trigger)
BZSHOTR
(status)
BZ (R43 terminal)
BZ (R42 terminal)
Fig. 10.5.1 Timing chart of 1-shot output
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