Maxim-integrated MAXQ7667 Manual do Utilizador descarregar pdf (Página 159)

8-29 __________________________________________________________________________________________________________

MAXQ7667 User’s Guide

Figur

e 8-9. UAR

T Mode 2

DIVIDE

BY 2

D7

D6

D5

D4

D3

D2

D1

D0

01

LOAD

CLOCK

T

RANSMIT SHIFT REGISTER

S

0

L

ATCH

RECEIVE DATA BUFFER WR

S

BUF

RD

D7

D6

D5

D4

D3

D2

D1

D0

CLOCK

RECEIVE SHIFT REGISTER

SI

RESET

S

HIFT

CLOCK

LOAD

S

ERIAL

BUFFER

L

OAD

SERIAL I/O

C

ONTROL

INTS

SHIFT

READ

S

ERIAL

B

UFFER

TI

FLAG =

SCON.1

RI

FLAG =

SCON.0

DIVIDE

BY 16

LDSBUF

RDSBUF

01

S

BUF

S

MOD

URX

PIN

S

YSTEM

CLOCK/2

DIVIDE

BY 16

BIT

DETECTION

UTX

P

IN

R

B8 =

SCON.2

TB8 =

S

CON.3

D8

START

STOP

D8

START

STOP

SERIAL

INTERRUPT

DATA BUS

D0START

START

D1 D2 D3 D4 D5 D6 D7 RB8

STOP

D0 D1 D2 D3 D4 D5 D6 D7 TB8 STOP

RECEIVE TIMING

SHIFT

RI

RXD

BIT DETECTOR

SAMPLING

TRANSMIT TIMING

LDSBUF

SHIFT

TI

TXD

1 2 ... 154 155 156 157 158 159 160 161 162 163 164 ... 346 347

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