P89C738 Ver la hoja de datos (PDF) - Philips Electronics
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P89C738 Datasheet PDF : 64 Pages
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Philips Semiconductors
8-bit Flash microcontrollers
Product specification
P89C738; P89C739
9.1 Interrupt Enable Register (IE)
Table 5 Interrupt Enable Register (SFR address A8H)
7
6
5
4
3
2
1
0
EA
−
ET2
ES
ET1
EX1
ET0
EX0
Table 6 Description of IE bits
BIT
SYMBOL
DESCRIPTION
7
EA
General enable/disable control. If EA = 0, no interrupt is enabled. If EA = 1, any
individually enabled interrupt will be accepted.
6
−
reserved
5
ET2
enable Timer 2 interrupt
4
ES
enable Serial Port interrupt
3
ET1
enable Timer 1 interrupt
2
EX1
enable external interrupt 1
1
ET0
enable Timer 0 interrupt
0
EX0
enable external interrupt 0
9.2 Interrupt Priority Register (IP)
Table 7 Interrupt Priority Register (SFR address B8H)
7
6
5
4
3
2
1
0
−
−
PT2
PS
PT1
PX1
PT0
PX0
Table 8 Description of IP bits
BIT
SYMBOL
7
−
reserved
6
−
reserved
5
PT2
Timer 2 interrupt priority level
4
PS
Serial Port interrupt priority level
3
PT1
Timer 1 interrupt priority level
2
PX1
external interrupt 1 priority level
1
PT0
Timer 0 interrupt priority level
0
PX0
external interrupt 0 priority level
DESCRIPTION
1998 Apr 07
18
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