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參數(shù)資料
| 型號： | AMBE2000 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | VOCODER CHIP |
| 中文描述： | 聲碼器芯片 |
| 文件頁數(shù)： | 14/47頁 |
| 文件大小： | 324K |
| 代理商： | AMBE2000 |
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AMBE-2000 Vocoder Chip
User’s Manual Version 3.0
page 14
Visit us at
www.dvsinc.com
Confidential Proprietary, Subject to Change
Figure 3-B Hardw are Reset Timing Diagram
Table 3-B Reset Timing Parameters
Reference
t
h
(RS)
t
w
(RSL)
t
su
(RS)
t
su
(INT)
CLKOUT is shown for reference only. It should not be connected in the circuit.
Parameter
Min
0
50
5
10
Max
Units
ns
μ
s
ns
ns
Hold time, RS after CLKOUT low
Pulse duration, RS low
Setup time, RS before X2/CLKIN low
Setup time, INTn, NMI, RS before CLKOUT low
3.4
Crystal / Oscillator Usage
The AMBE-2000 Vocoder Chip has an input clock frequency of 16.384 MHz. Two options are outlined below in providing
this signal. The option used is specified by the CLOCK_MODE pin 51.
The following points should be noted when designing any printed circuit board layout:
Keep the crystal and external capacitors as close to the CLK_ I and CLK_ I2
pins as possible to minimize board stray capacitance.
Keep X2/CLKIN and X1 away from high frequency digital traces (example
CLKOUT) to avoid coupling.
3.4.1 TTL Clock Source
If CLOCK_MODE pin is low then a TTL/CMOS source is used as the clock input. Connect X2/CLKIN and X1 as follows:
t
w
(RSL)
t
su
(RS)
t
h
(RS)
t
su
(INT)
~
~
~
X2/CLKIN
RESETN
CLKOUT
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