W742E Datasheet, PDF (26/60 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C811
by executing the DIS INT instruction. When an interrupt is generated in the hold mode, the hold mode
will be released momentarily and interrupt service routine will be executed. After executing interrupt
service routine, the µC will enter hold mode automatically. The operation flow chart is shown in Figure
5-9. The control diagram is shown Figure 5-8.
Divider 0
overflow signal
SQ
R
Timer 0
underflow signal
SQ
R
Initial Reset
EN INT
MOV IEF,#I
EVF.0
IEF.0
EVF.1
IEF.1
RC.0-3 signal
SQ
R
EVF.2
IEF.2
Enable
Interrupt
Process
Circuit
Interrupt
Vector
Generator
004H
008H
020H
P1.2 (/INT0) signal
SQ
R
Divider 1
overflow signal
SQ
R
Serial I/O signal
SQ
R
P1.3(/INT1) signal
SQ
R
Timer 1
underflow signal
SQ
R
EVF.3
IEF.3
EVF.4
IEF.4
EVF.5
IEF.5
EVF.6
IEF.6
EVF.7
IEF.7
Initial Reset
Disable
CLR EVF,#I instruction
Figure 5-8 Interrupt event control diagram
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DIS INT instruction