Philips Semiconductors
Preliminary specification
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM,
capture/compare, high I/O, low voltage (2.7V–5.5V), low power
P87C552
7
6
5
4
3
2
1
0
Reset Value = C0H
STE (EEH)
TG47
(MSB)
TG46
SP45
SP44
SP43
SP42
SP41
SP40
(LSB)
BIT
SYMBOL FUNCTION
STE.7
STE.6
STE.5
STE.4
STE.3
STE.2
STE.1
STE.0
TG47
TG46
SP45
SP44
SP43
SP42
SP41
SP40
Toggle flip-flops
Toggle flip-flops
If “1” then P4.5 is set on a match between CM0 and Timer T2
If “1” then P4.4 is set on a match between CM0 and Timer T2
If “1” then P4.3 is set on a match between CM0 and Timer T2
If “1” then P4.2 is set on a match between CM0 and Timer T2
If “1” then P4.1 is set on a match between CM0 and Timer T2
If “1” then P4.0 is set on a match between CM0 and Timer T2
SU01087
Figure 15. Set Enable Register (STE)
Reset Value = 00H
7
6
5
4
3
2
1
0
TM2IR (C8H) T2OV
CMI2
CMI1
CMI0
CTI3
CTI2
CTI1
CTI0
(LSB)
(MSB)
BIT
SYMBOL FUNCTION
TM2IR.7
TM2IR.6
TM2IR.5
TM2IR.4
TM2IR.3
TM2IR.2
TM2IR.1
TM2IR.0
T2OV
CMI2
CMI1
CMI0
CTI3
CTI2
CTI1
CTI0
Timer T2 16-bit overflow interrupt flag
CM2 interrupt flag
CM1 interrupt flag
CM0 interrupt flag
CT3 interrupt flag
CT2 interrupt flag
CT1 interrupt flag
CT0 interrupt flag
Interrupt Flag Register (TM2IR)
7
6
5
4
3
2
1
0
Reset Value = 00H
IP1 (F8H)
PT2
PCM2
PCM1
PCM0
PCT3
PCT2
PCT1
PCT0
(LSB)
(MSB)
BIT
SYMBOL FUNCTION
IP1.7
IP1.6
IP1.5
IP1.4
IP1.3
IP1.2
IP1.1
IP1.0
PT2
Timer T2 overflow interrupt(s) priority level
Timer T2 comparator 2 interrupt priority level
Timer T2 comparator 1 interrupt priority level
Timer T2 comparator 0 interrupt priority level
Timer T2 capture register 3 interrupt priority level
Timer T2 capture register 2 interrupt priority level
Timer T2 capture register 1 interrupt priority level
Timer T2 capture register 0 interrupt priority level
PCM2
PCM1
PCM0
PCT3
PCT2
PCT1
PCT0
Timer 2 Interrupt Priority Register (IP1)
SU01088
Figure 16. Interrupt Flag Register (TM2IR) and Timer T2 Interrupt Priority Register (IP1)
19
1999 Mar 30
NXP [ NXP ]
