MAS9138 데이터 시트보기 (PDF) - Micro Analog Systems Oy

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MAS9138

ASYNCHRONOUS TO SYNCHRONOUS CONVERTER

Micro Analog Systems Oy 

DA9138.005

12 April, 2006

APPLICATION INFORMATION

Synchronous modem with asynchronous interface

The MAS9138 is intended for applications where an asynchronous and synchronous data source must be linked

together. A typical case appears in a data modem where the terminal interface of the modem has been specified to

be asynchronous but the modem data pump operates in a synchronous fashion.

RS232C

INTERFACE

MAS9138

MODEM CIRCUITS

TXD

RXD

TDI

RDO

TDO

TXC

RDI

RXC

PHONE LINE

Synchronous serial interface with uP interface

Another application is a synchronous serial interface for uP which uses UART as a data source. The concept is

illustrated below.

UART

MAS9138

T TL /V .2 8

RS-232-C

V.24

TxD

RDI

RxD

uP-INTERFACE

TDO

RxC

TxC

7 (10)

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