W742E Datasheet, PDF (28/60 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C811
Divider 0, Divider 1, Timer
0, Timer 1, Signal Change at
RC,RD port, falling edge at
P1.2,P1.3, Serial I/O
Yes
No
Interrupt
Enable?
Yes
No
IEF
Flag Set?
Yes
Reset EVF Flag
Execute
Interrupt Service Routine
(Note)
No
Disable interrupt
In
HOLD
Mode?
HEF
Flag Set?
No
No
Interrupt
Enable?
Yes
IEF
No
Flag Set?
Yes
Reset EVF Flag
Execute
Interrupt Service Routine
Yes
(Hold release)
(Note)
Disable interrupt
HOLD
PC <- (PC+1)
Note: The bit of EVF corresponding to the interrupt signal will be reset.
** The RD port can not occur interrupt service , it only can release hold mode.
Figure 5-9 Hold Mode and Interrupt Operation Flow Chart
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