Intel 386 Computer Hardware User Manual


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13-9
SYNCHRONOUS SERIAL I/O UNIT
Figure 13-8. Transmit Data by Polling
A3394-01
No
TUE=1
?
Yes
Error
Routine
AUTOTXM=1
?
No
Yes
AUTOTXM=1
?
Enable Transmitter
TEN=1
THBE=1
?
Yes
Delay To Allow Transmitter
To Shift First Bit Out
Disable Transmitter
TEN=0
No
No
Yes
Write Data to Buffer
(SSIOTBUF)
Initialize SSIO
Write Data to Buffer
(SSIOTBUF)
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