M80C196KB datasheet(20/30 Pages) INTEL

20 / 30 page

M80C196KB

IOC0 (15H)

271089 – 12

IOS1 (16H)

271089 – 13

IOC1 (16H)

271089 – 14

Port 2 Multiple Functions

Func

Alternative

Control

Function

Reg

Output

TXD (Serial Port

IOC15

Transmit)

Input

RXD (Serial Port

SPCON3

Receive)

Input

T2CLK (Timer2 Clock

IOC07

Baud)

Input

T2RST (Timer2 Reset)

IOC05

Output

PWM Output

IOC10

QBD

Timer2 up

IOC21

down select

QBD

Timer2 Capture

QBD e Quasi-bidirectional

Baud Rate Calculations

Asynchronous Modes 1 2 and 3

Baud

Reg e

XTAL1

Baud Rate c 16

1OR

T2CLK

Baud Rate c 8

Synchronous Mode 0

Baud

Reg e

XTAL1

Baud Rate c 2

1OR

T2CLK

Baud Rate

Baud Rates and Baud Register Values

Baud

XTAL Frequency

Rate

80 MHz

100 MHz

120 MHz

300

1666 b002 2082

002

2499

000

1200

416

008

520

003

624

000

2400

207

016

259

016

312

016

4800

103

016

129

016

155

016

9600

016

192K

016

140

016

Baud Register Value% Error

A maximum baud rate of 750 Kbaud is available in

the asynchronous modes with 12 MHz on XTAL1

The synchronous mode has a maximum rate of 30

Mbaud with a 12 MHz clock Location 0EH is the

Baud Register It is loaded sequentially in two bytes

with the low byte being loaded first This register

may not be loaded with zero in serial port Mode 0

NOTE

The maximum T2CLK rate is 3 MHz when used to

set the baud rate

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