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參數資料
| 型號： | HE85750 |
| 廠商： | King Billion Electronics Co., Ltd. |
| 英文描述： | 8-bit Micro-controller |
| 中文描述： | 8位微控制器 |
| 文件頁數： | 17/23頁 |
| 文件大?。?/td> | 399K |
| 代理商： | HE85750 |
King Billion Electronics Co., Ltd
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HE85750
HE80000 SERIES
2003/7/30
This specification is subject to change without notice. Please contact sales person for the latest version before use.
17
V1.52E
DA = 0x20
DA = 0x80
DA = 0xE0
1 subframe
The PWM bit of VOC register controls register to enable the circuit and output driver. When PWM bit of
VOC is ‘0’, PWME bit and output drivers settings are both cleared. To use PWM for voice output, PWM
bit has to be set to ‘1’ first, then set PWME bit and enable output driver by setting the driver number. If
PWM bit is disabled and enabled again, the setting for driver and PWME bit will be clear.
The Fast Clock is gated through PWME bit of PWMC command register to provide the clock source of
PWM circuit when it is enabled. As PWM needs higher frequency to operate, it cannot generate correct
PWM signal in Slow clock only mode.
When the program enters into Sleep mode or Idle mode, it will automatically turn off all voice outputs by
clearing VOC[2:1] to ”00”. To activate voice output again when returning to Normal Mode, the VOC
register needs to be set again.
The PWM output volume can be adjusted by command register PWMC[6:4]. The bit 6 and 5 control 2
time driver, while bit 4 controls 1 time driver, thus it has 5 levels of driver output. By turning on/off the
internal drivers, the sound level of PWM output can be turned up and down. Please note that this
adjustment apply only to PWM, but not DA output.
PWM output driver selection
PWMC[6..4]
Number of Driver
000
001
010
011
100
101
110
111
off
1
2
3
2
3
4
5
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