P87C660X2 PHILIPS [NXP Semiconductors], P87C660X2 Datasheet - Page 65

• Manufacturer Part Number: P87C660X2
• Description: 80C51 8-bit microcontroller family
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2003 Oct 02
80C51 8-bit microcontroller family
RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33
MHz), two 400KB I
BIT
IE.7
IE.6
IE.5
IE.4
IE.3
IE.2
IE.1
IE.0
BIT
IP.7
IP.6
IP.5
IP.4
IP.3
IP.2
IP.1
IP.0
BIT
IPH.7
IPH.6
IPH.5
IPH.4
IPH.3
IPH.2
IPH.1
IPH.0
IPH (B7H)
IE (0A8H)
IP (0B8H)
SYMBOL
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
SYMBOL
–
PPC
PT2
PS
PT1
PX1
PT0
PX0
SYMBOL
–
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
2
C interfaces
Enable Bit = 1 enables the interrupt.
Enable Bit = 0 disables it.
Priority Bit = 1 assigns high priority
Priority Bit = 0 assigns low priority
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
FUNCTION
Global disable bit. If EA = 0, all interrupts are disabled. If EA = 1, each interrupt can be individually
enabled or disabled by setting or clearing its enable bit.
PCA interrupt enable bit
Timer 2 interrupt enable bit.
Serial Port interrupt enable bit.
Timer 1 interrupt enable bit.
External interrupt 1 enable bit.
Timer 0 interrupt enable bit.
External interrupt 0 enable bit.
FUNCTION
–
PCA interrupt priority bit
Timer 2 interrupt priority bit.
Serial Port interrupt priority bit.
Timer 1 interrupt priority bit.
External interrupt 1 priority bit.
Timer 0 interrupt priority bit.
External interrupt 0 priority bit.
FUNCTION
–
PCA interrupt priority bit
Timer 2 interrupt priority bit high.
Serial Port interrupt priority bit high.
Timer 1 interrupt priority bit high.
External interrupt 1 priority bit high.
Timer 0 interrupt priority bit high.
External interrupt 0 priority bit high.
EA
7
7
–
7
–
PPCH
PPC
EC
16 KB OTP/ROM, 512B
6
6
6
PT2H
ET2
PT2
5
5
5
Figure 33. IPH Registers
Figure 31. IE Registers
Figure 32. IP Registers
PSH
ES
PS
4
4
4
65
PT1H
ET1
PT1
3
3
3
PX1H
EX1
PX1
2
2
2
PT0H
ET0
PT0
1
1
1
PX0H
EX0
PX0
SU01291
0
0
0
SU01292
P8xC660X2/661X2
SU01290
Product data