P80C31SFPN PHILIPS [NXP Semiconductors], P80C31SFPN Datasheet - Page 18

• Manufacturer Part Number: P80C31SFPN
• Description: 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage 2.7V.5.5V, low power, high speed 33 MHz
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2000 Jan 20
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
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)
IP (0B8H)
SYMBOL
—
—
PT2
PS
PT1
PX1
PT0
PX0
SYMBOL
—
—
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
FUNCTION
Not implemented, reserved for future use.
Not implemented, reserved for future use.
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
Not implemented, reserved for future use.
Not implemented, reserved for future use.
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.
—
—
7
7
—
—
6
6
PT2H
PT2
5
5
Figure 12. IPH Registers
Figure 11. IP Registers
PSH
PS
4
4
18
PT1H
PT1
3
3
PX1H
PX1
2
2
PT0H
PT0
1
1
SU00572
PX0H
PX0
80C51/87C51/80C31
0
0
SU01058
Product specification