ST90R158 datasheet(142/190 Pages) STMICROELECTRONICS

tên linh kiện	ST90R158

Giải thích chi tiết về linh kiện	8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM

PDF	190 Pages

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ST90158 - SERIAL COMMUNICATIONS INTERFACE (SCI)

SERIAL COMMUNICATIONS INTERFACE (Cont’d)

9.5.2 Functional Description

The SCI offers four operating modes:

– Asynchronous mode

– Asynchronous mode with synchronous clock

– Serial expansion mode

– Synchronous mode

Asynchronous mode, Asynchronous mode with

synchronous clock and Serial expansion mode

output data with the same serial frame format. The

differences lie in the data sampling clock rates

(1X, 16X) and in the protocol used.

Figure 76. SCI Functional Schematic

Note: Some pins may not be available on some devices. Refer to the device Pinout Description.

Divider by 16

The control signals marked with (*) are active only in synchronous mode (SMEN=1)

Polarity

TXclk / CLKout

RX shift

TX buffer

TX shift

RTSEN (*)

Enveloper

AEN (*)

OUTSB (*)

Sout

AEN

RX buffer

Baud rate

generator

RXclk

OCKSB (*)

LBEN (*)

INTCLK

XBRG

AEN (*)

OCLK

XTCLK

DCDEN (*)

DCD

RTS

Sin

INPL (*)

LBEN

OUTPL (*)

INPE N (*)

OCKPL (*)

XRX

OCLK

VR02054

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