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| 型號(hào)： | MSM7502 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分類： | Codec |
| 英文描述： | Multi-Function PCM CODEC |
| 中文描述： | 多功能的PCM編解碼器 |
| 文件頁(yè)數(shù)： | 4/35頁(yè) |
| 文件大?。?/td> | 196K |
| 代理商： | MSM7502 |
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Semiconductor
MSM7502
4/35
PIN AND FUNCTIONAL DESCRIPTIONS
LA, LB
General latch outputs for external control.
Statuses of these outputs are controlled via the processor interface. Refer to the description of the
control data for details. These outputs provide the capability to drive one TTL.
DG
Digital Ground.
DG is separated from the analog ground AG inside the device. But, DG should be connected as
close to the AG pin on PCB as possible.
AG
Analog Ground.
SA0, SA1
Sounder (calling tone) driving outputs.
The output signal on SA1 is inverted against the signal on SA0. The sounder circuit can be easily
configured by connecting a piezo-sounder between SA0 and SA1. Through processor control, the
calling tone volume is selectable from four levels and one of six tone combinations is selectable.
Initially, the ringing tone volume is set at a maximum and the tone combination is set at a 16 Hz
Wamble tone by a combination of 1 kHz and 1.3 kHz. If these pins are used with no-load, tone
volume cannot be controlled. When tone volume control is required, a load resistor must be
connected between SA0 and SA1.
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| MSM7503 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Multi-Function PCM CODEC |
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