參數(shù)資料
型號: HT84XXX
廠商: Holtek Semiconductor Inc.
英文描述: Magic VoiceTM
中文描述: 魔術(shù)VoiceTM
文件頁數(shù): 12/31頁
文件大?。?/td> 246K
代理商: HT84XXX
HT84XXX
12
April 26, 2000
The capability of the voice sampling rate for
various voice compression format.
f
OSC
PCM8
-law
PCM
AD4
4M
12kHz
11kHz
8kHz
5M
15kHz
14kHz
10kHz
6M
18kHz
16kHz
12kHz
8M
24kHz
22kHz
16kHz
Oscillator configuration
The HT84XXX series provides an RC oscillator
for the system clock. The system oscillator
stops in the standby state so as to reduce power
consumption.
For the oscillator circuit, an external resistor is
required between OSC and VSS. The oscillator
frequency is typically 4MHz for an external re-
sistor of 240k . The RC type of oscillator offers
the most cost-effective solution, although the
frequency of the oscillation may vary with tem-
perature and the chip itself due to process vari-
ation.
R
OSC
f
OSC
HT84EVA
HT84P00
IC
4M
180k
240k
240k
5M
150k
210k
210k
6M
120k
180k
180k
8M
91k
150k
150k
Mask options
The following options have to be defined to en-
sure a proper system functioning:
Pull-high resistor: 33k /98k
Keydebouncetime:0ms~255ms(f
OSC
=4MHz)
(3V)
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