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參數(shù)資料
| 型號(hào)： | EM20055A |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Single Chip Voice Synthesizer IC(帶內(nèi)置掩膜ROM的單片語(yǔ)音合成IC) |
| 中文描述： | 單芯片語(yǔ)音合成器集成電路（帶內(nèi)置掩膜ROM的的單片語(yǔ)音合成芯片） |
| 文件頁(yè)數(shù)： | 4/9頁(yè) |
| 文件大?。?/td> | 56K |
| 代理商： | EM20055A |
4
* This specification are subject to be changed without notice.
4.19.1996
EM20055A
3 SEC. VOICEYNTHESIZER IC
1
2
3
4
4.0 KHz
4.8 KHz
6.0 KHz
8.0 KHz
For playing speed adjustment, EM20055A provides 4 steps for each section setting :
Step
Playing Speed
C). Stop Pulse, Active Signal and Flash Driver
EM20055A provides three output signals for external device control. They are STP pin, ACT pin and FSH
pin.
The STP signal is provided to trigger another voice group or to activate external device. At the end of
presetting vioce group playing, STP will issue a positive pulse with pulse width 40ms. The presetting
voice group of STP is set by masked option, i.e., customer may set the end of group 1 and group 4 issue
stop pulse, but group 2 and group 3 has no stop pulse issued.
While voice playing, ACT pin stays in high level to turn on external device, and FSH pin sends out a
10 Hz, duty cycle 25% pulse train to drive LED directly.
D). Operation functions
EM20055A provides 4 trigger modes selected by MS1 and MS2:
MODE
1
2
3
4
MS1
L
L
H
H
MS2
H
L
H
L
Trigger operation
One-shot mode with re-trigger
One-shot mode without re-trigger
Level hold mode
One key trigger mode
Mode 1
: (One-shot with re-trigger)
In mode 1, the chip is triggered by the rising edge of TR pin. Once triggered, EM20055A plays the
corresponding voice group one time.
VOICE GROUP k PLAYING
POWER DOWN
TRk
VO
STP
ACT
FSH
Fig. 1
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