Maxim-integrated MAXQ7667 Manual de usuario descargar pdf (Pagina 156)

__________________________________________________________________________________________________________ 8-26

MAXQ7667 User’s Guide

Figur

e 8-7. UAR

T Mode 0

DIVIDE

B

Y 12

D7

D6

D5

D4

D3

D2

D1

D0

LOAD

CLOCK

OUTPUT SHIFT REGISTER

S

0

LATCH

R

ECEIVE DATA BUFFER WR

S

BUF

R

D

D7

D6

D5

D4

D3

D2

D1

D0

CLOCK

RECEIVE SHIFT REGISTER

SI

BAUD

CLOCK

LOAD

S

ERIAL

BUFFER

RECEIVE

BUFFER

DATA

C

LOCK

SERIAL I/O

C

ONTROL

INTS

SHIFT

R

EAD

SERIAL

T

I

FLAG =

SCON.1

R

I

FLAG =

SCON.0

DIVIDE

B

Y 4

LDSBUF

R

DSBUF

0

1

LDSBUF



SHIFT



RXD



(DATA OUT)



TXD



(DATA CLOCK)



TI



WRITE TO SCON (CLEAR RI) 



WRITE TO SBSUF0 



TRANSMIT TIMING

RECEIVE TIMING

S

BUF

UTX

PIN

SYSTEM

C

LOCK

RDSBUF



SHIFT



RXD



(DATA IN)



TXD



(DATA CLOCK)



RI



D0 D1 D2 D3 D4 D5 D6 D7

D0 D1 D2 D3 D4 D5 D6 D7

U

RX

P

IN

SERIAL

INTERRUPT

D

ATA BUS

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