Figure 4-34

118

Serial port (mode

 

2) timing chart

TX CLOCK

WRITE TO SBUF

TXDSTART BITD0D1D2D3D4D5D6D7TBB STOP BIT

TERMINATE TRANSMISSION

TI

M1·S3

RXD

START BIT

D0

D1

D2

D3

D4

D5

D6

D7

RBB

STOP BIT

RX COUNTER RUN

 

 

 

 

 

 

 

 

 

 

 

RXD SAMPLE CLOCK

SHIFT-IN CLOCK

LOAD SBUF

TERMINATE RECEPTION

RI or SERR SET

M1·S3

MSM80C154S/83C154S/85C154HVS

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Image 125
Sonic Alert msm85c154hvs, msm83c154s, msm80154s user manual 118, Serial port mode