W78C438C_06 Datasheet, PDF (10/22 Pages) Winbond – 8-BIT MICROCONTROLLER

W78C438C
BIT ADDR. NAME
FUNCTION
7 0C7H PX3 ^{High/low priority level for INT3 is specified when this bit is set/cleared by}
software.
6 0C6H EX3 _{Enable/disable interrupt from INT3 when this bit is set/cleared by software.}
5 0C5H
IE3
If IT3 is "1," IE3 is set/cleared automatically by hardware when interrupt is
detected/serviced.
4 0C4H
IT3 ^{INT3 is falling-edge/low-level triggered when this bit is set/cleared by}
software.
3 0C3H
2 0C2H
1 0C1H
PX2 ^{High/low priority level for INT2 is specified when this bit is set/cleared by}
software.
EX2 _{Enable/disable interrupt from INT2 when this bit is set/cleared by software.}
IE2
If IT2 is "1," IE2 is set/cleared automatically by hardware when interrupt is
detected/serviced.
0 0C0H
IT2 ^{INT2 is falling-edge/low-level triggered when this bit is set/cleared by}
software.
Table 2. Functions of XICON Register
INTERRUPT SOURCE
External Interrupt 0
Timer/Counter 0
External Interrupt 1
Timer/Counter 1
Serial Port
Timer/Counter 2
External Interrupt 2
External Interrupt 3
VECTOR ADDRESS
03H
0BH
13H
1BH
23H
2BH
33H
3BH
Table 3. Priority of Interrupts
PRIORITY SEQUENCE
0 (Highest)
1
2
3
4
5
6
7 (Lowest)
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