PSB7230 데이터 시트보기 (PDF) - Siemens AG

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PSB7230

Joint Audio Decoder-Encoder for Analog Videophone JADE AN

Siemens AG 

PSB 7230

Introduction

Table 1

Parallel Host Interface (cont’d)

Pin No. Symbol Function Descriptions

17

INTR O (OD) Interrupt Real-time.

Interrupt output line for high priority interrupt status

(serial audio receive/transmit, serial HDLC data

receive/transmit data) to host.

18

INT

O (OD) Interrupt Request.

Interrupt output line for all other interrupt states.

Table 2

IOM-2 Interface

Pin No. Symbol Function Descriptions

23

DD

I/O(OD) Data Downstream on IOM-2/PCM interface.

22

DU

I/O(OD) Data Upstream on IOM-2/PCM interface.

21

DCL I/O(OD) Data Clock.

Clock frequency is twice the data rate, or equal to the

data rate.

20

FSC I/O(OD) Frame Sync.

Marks the beginning of a physical IOM-2 or PCM frame.

Table 3

Serial Audio Interface

Pin No. Symbol Function Descriptions

1

SCLK I/O

Serial Clock.

Serial clock for SR and ST.

100 SR

I/O(OD)

Serial Data Receive.

Should be connected to VSS via a pulldown resistor if not

used.

99

ST

I/O(OD) Serial Data Transmit.

98

RFS I/O

Audio Receive Frame Sync.

97

TFS I/O

Audio Transmit Frame Sync.

Semiconductor Group

11

Data Sheet 1998-07-01

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