MR82510 Ver la hoja de datos (PDF) - Intel

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componentes Descripción

Fabricante

MR82510

ASYNCHRONOUS SERIAL CONTROLLER

Intel 

M82510

M82510 PINOUT DEFINITION (Continued)

Symbol

Pin

No

Type

Name and Description

TXD

6 O TRANSMIT DATA Serial data is transmitted via this output pin starting at the

Least Significant bit

RXD

13 I RECEIVE DATA Serial data is received on this input pin starting at the Least

Significant bit

RI SCLK 10 I MULTIFUNCTION This is a dual function pin which can be configured to one of

the following functions RI - Ring Indicator - Input active low This is a general

purpose input pin accessible by the CPU SCLK - This input pin may serve as a

source for the internal serial clock(s) RxClk and or TxClk See Figure 12 BRG

sources and outputs

DTR TB

15 O MULTIFUNCTION This is a dual function pin which may be configured to one of

the following functions DTR - Data Terminal Ready Output active low This is a

general purpose output pin controlled by the CPU TB - This pin outputs the

BRGB output signal when configured as either a clock generator or as a timer

When BRGB is configured as a timer this pin outputs a ‘‘timer expired pulse ’’

When BRGB is configured as a clock generator it outputs the BRGB output

clock

DSR TA

OUT0

11 I O MULTIFUNCTION This is a multifunction pin which may be configured to one of

the following functions DSR - Data Set Ready Input active low This is a

general purpose input pin accessible by the CPU TA - This pin is similar in

function to pin TB except it outputs the signals from BRGA instead of BRGB

OUT0 - Output pin This is a general purpose output pin controlled by the CPU

RTS

16 O REQUEST TO SEND Output pin active low This is a general purpose output

pin controlled by the CPU In addition in automatic transmission mode this pin

along with CTS controls the transmission of data (See Transmit modes for

further detail ) During hardware reset this pin is an input It is used to determine

the System Clock Mode (See System Clock Generation for further detail )

CTS

14 I CLEAR TO SEND Input pin active low In automatic transmission mode it

directly controls the Transmit Machine (See transmission mode for further

details ) This pin can be used as a General Purpose Input

DCD ICLK 12 I O MULTIFUNCTION This is a multifunction pin which may be configured to one of

OUT1

the following functions DCD - Data Carrier Detected Input pin active low This

is a general purpose input pin accessible by the CPU ICLK - This pin is the

output of the internal system clock OUT1 - General purpose output pin

Controlled by the CPU

VSS

7 P Ground

VCC

21 P Power a5V Supply

Table 1 Multifunction Pins

Pin

IO

Timing

Modem

8

OUT2

X2

9

CLK X1

10

SCLK

RI

11

OUT0

TA

DSR

12

OUT1

ICLK

DCD

14

CTS

15

TB

DTR

16

Default

RTS

3

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