AT89LP51RB2_14 Datasheet, PDF (65/254 Pages) ATMEL Corporation – 8-bit Microcontroller Compatible with 8051 Products

AT89LP51RB2/RC2/IC2 Preliminary
Table 9-7. IPH0 – Interrupt Priority High Register 0
IPH0 = B7H
Not Bit Addressable
IP1DIS
PPCH
PT2H
PSH
Bit
7
6
5
4
PT1H
3
Reset Value = 0000 0000B
PX1H
2
PT0H
1
PX0H
0
Symbol
IP1DIS
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Function
Interrupt Level 1 Disable
Clear to enable all interrupts with priority level 1. Set to disable all interrupts with priority level 1.
PCA Interrupt Priority High
High order bit for PCA interrupt priority level.
Timer 2 Interrupt Priority High
High order bit for Timer 2 interrupt priority level.
Serial Port Interrupt Priority High
High order bit for UART interrupt priority level.
Timer 1 Interrupt Priority High
High order bit for Timer 1 interrupt priority level.
External Interrupt 1 Priority High
High order bit for INT1 interrupt priority level.
Timer 0 Interrupt Priority High
High order bit for Timer 0 interrupt priority level.
External Interrupt 0 Priority High
High order bit for INT0 interrupt priority level.
Table 9-8. IPH1 – Interrupt Priority High Register 1
IPH1 = B3H
Not Bit Addressable
IP3DIS
–
PADCH
PCMPH
–
Bit
7
6
5
4
3
Reset Value = 0000 0000B
PSPH
2
PTWH
1
PKBH
0
Symbol
IP3DIS
PADCH
PCMPH
PSPH
PTWH
PKBH
Function
Interrupt Level 3 Disable
Clear to enable all interrupts with priority level 3. Set to disable all interrupts with priority level 3.
ADC Interrupt Priority High
High order bit for ADC interrupt priority level.
Analog Comparator Interrupt Priority High
High order bit for Analog Comparator interrupt priority level.
SPI Interrupt Priority High
High order bit for SPI interrupt priority level.
TWI Interrupt Priority High
High order bit for TWI interrupt priority level.
Keyboard Interrupt Priority High
High order bit for Keyboard interrupt priority level.
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