P87C554 NXP Semiconductors, P87C554 Datasheet - Page 31

• Manufacturer Part Number: P87C554
• Description: The P87C554 Single-Chip 8-Bit Microcontroller is manufactured inan advanced CMOS process and is a derivative of the 80C51microcontroller family
• Manufacturer: NXP Semiconductors

In all cases, if the enable bit is 0, then the interrupt is disabled, and if the enable bit is 1, then the interrupt is enabled.
Philips Semiconductors
2002 Mar 25
80C51 8-bit microcontroller – 12 clock operation
16K/512 OTP/RAM, 8 channel 10-bit A/D, I
capture/compare, high I/O
IEN1 (E8H)
IP0H (B7H)
IP0 (B8H)
BIT
IEN1.7
IEN1.6
IEN1.5
IEN1.4
IEN1.3
IEN1.2
IEN1.1
IEN1.0
BIT
IP0.7
IP0.6
IP0.5
IP0.4
IP0.3
IP0.2
IP0.1
IP0.0
BIT
IP0H.7
IP0H.6
IP0H.5
IP0H.4
IP0H.3
IP0H.2
IP0H.1
IP0H.0
(MSB)
(MSB)
(MSB)
ET2
7
7
–
7
–
ECM2
PADH
PAD
SYMBOL
ET2
ECM2
ECM1
ECM0
ECT3
ECT2
ECT1
ECT0
SYMBOL
–
PAD
PS1
PS0
PT1
PX1
PT0
PX0
SYMBOL
–
PADH
PS1H
PS0H
PT1H
PX1H
PT0H
PX0H
Figure 30. Interrupt Priority Register High (IP0H)
6
6
6
Figure 28. Interrupt Enable Register (IEN1)
Figure 29. Interrupt Priority Register (IP0)
ECM1
PS1H
PS1
5
5
5
FUNCTION
Enable Timer T2 overflow interrupt(s)
Enable T2 Comparator 2 interrupt
Enable T2 Comparator 1 interrupt
Enable T2 Comparator 0 interrupt
Enable T2 Capture register 3 interrupt
Enable T2 Capture register 2 interrupt
Enable T2 Capture register 1 interrupt
Enable T2 Capture register 0 interrupt
FUNCTION
Unused
ADC interrupt priority level
SIO1 (I
SIO0 (UART) interrupt priority level
Timer 1 interrupt priority level
External interrupt 1 priority level
Timer 0 interrupt priority level
External interrupt 0 priority level
FUNCTION
Unused
ADC interrupt priority level high
SIO1 (I
SIO0 (UART) interrupt priority level high
Timer 1 interrupt priority level high
External interrupt 1 priority level high
Timer 0 interrupt priority level high
External interrupt 0 priority level high
2
ECM0
PS0H
C, PWM,
PS0
2
2
4
4
4
C) interrupt priority level
C) interrupt priority level high
29
ECT3
PT1H
PT1
3
3
3
PX1H
ECT2
PX1
2
2
2
ECT1
PT0H
PT0
1
1
1
ECT0
(LSB)
(LSB)
PX0H
(LSB)
PX0
SU00755
SU00763
SU00983
0
0
0
P87C554
Product data