Interrupt Service Routine For Transmitting Data Using Interrupts - Intel 386 User Manual

Intel386™ EX EMBEDDED MICROPROCESSOR USER'S MANUAL
Figure 13-9. Interrupt Service Routine for Transmitting Data Using Interrupts
13-10
SSIO Transmitter
Causes Interrupt
Disable Interrupts While
Transmitting Data
No
THBE=1
?
Yes
Write Data to Buffer
(SSIOTBUF)
Enable Transmitter
TEN=1
Delay To Allow Transmitter
To Shift First Bit Out
Disable Transmitter
TEN=0
Enable Interrupts
Exit Interrupt Service Routine
Error
Routine
A3398-01