P89C668 Philips Semiconductors, P89C668 Datasheet - Page 20

• Manufacturer Part Number: P89C668
• Description: 80C51 8-bit Flash microcontroller family 64KB ISP FLASH with 8KB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2001 Jul 27
80C51 8-bit Flash microcontroller family
64KB ISP Flash with 8KB RAM
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
BIT
IEN1.7
IEN1.6
IEN1.5
IEN1.4
IEN1.3
IEN1.2
IEN1.1
IEN1.0
IEN1 (E8H)
IPH (B7H)
IP (0B8H)
SYMBOL
PT2
PPC
PS1
PS0
PT1
PX1
PT0
PX0
SYMBOL
PT2H
PPCH
PS1H
PS0H
PT1H
PX1H
PT0H
PX0H
SYMBOL
—
—
—
—
—
—
—
ET2
Priority Bit = 1 assigns high priority
Priority Bit = 0 assigns low priority
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
PT2H
PT2
FUNCTION
Timer 2 interrupt priority bit.
PCA interrupt priority bit
Serial I/O1 (I
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
Timer 2 interrupt priority bit high.
PCA interrupt priority bit
Serial I/O (I
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.
FUNCTION
Timer 2 interrupt enable bit.
—
7
7
7
PPCH
PPC
—
6
6
6
2
C) interrupt priority bit high.
2
C) interrupt priority bit.
PS1H
PS1
—
5
5
5
Figure 13. IEN1 Registers
Figure 12. IPH Registers
Figure 11. IP Registers
PS0H
PS0
—
4
4
4
20
PT1H
PT1
—
3
3
3
PX1H
PX1
—
2
2
2
PT0H
PT0
—
1
1
1
PX0H
PX0
ET2
SU01461
0
0
SU01462
0
SU01095
P89C668
Preliminary data