Maxim-integrated MAXQ7667 Uživatelský manuál stáhnout pdf (Strana 160)

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MAXQ7667 User’s Guide

Figur

e 8-10. UAR

T Mode 3

D0 D1 D2 D3 D4 D5 D6 D7 RB8 STOP

D0 D1 D2 D3 D4 D5 D6 D7 TB8 STOP

RECEIVE TIMING

TRANSMIT TIMING

B

AUD

CLOCK

DIVIDE

BY 4

D7

D6

D5

D4

D3

D2

D1

D0

0

1

LOAD

CLOCK

T

RANSMIT SHIFT REGISTER

S

0

LATCH

RECEIVE DATA BUFFER WR

S

BUF

RD

D7

D6

D5

D4

D3

D2

D1

D0

CLOCK

RECEIVE SHIFT REGISTER

SI

RESET

LOAD

SERIAL

B

UFFER

L

OAD

SERIAL I/O

CONTROL

INTS

SHIFT

READ

S

ERIAL

B

UFFER

TI

FLAG =

SCON.1

RI

FLAG =

SCON.0

DIVIDE

BY 16

L

DSBUF

RDSBUF

01

SBUF

S

MOD

URX

PIN

S

YSTEM

CLOCK

DIVIDE

BY 16

BIT

DETECTION

U

TX

PIN

BAUD-CLOCK

G

ENERATOR

START

STOP

START

SERIAL

INTERRUPT

DATA BUS

TB8 =

SCON.3

D8

R

B8 =

S

CON.2

D8

STOP

LDSBUF

SHIFT

TI

TXD

SHIFT

RI

RXD

BIT DETECTOR

SAMPLING

START

START

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