P89V51RD2 Philips Semiconductors, P89V51RD2 Datasheet - Page 55

• Manufacturer Part Number: P89V51RD2
• Description: 8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 12964
Product data
Table 44:
Bit addressable; Reset value: 00H
Table 45:
Table 46:
Bit addressable; Reset value: 00H
Table 47:
Table 48:
Bit addressable; Reset value: 00H
Table 49:
Bit
7
6
5
4
3
2
1
0
Bit
7 to 4
3
2 to 0
Bit
7
6
5
4
3
2
1
0
Bit
Symbol
Bit
Symbol
Bit
Symbol
IEN0 - Interrupt enable register 0 (address A8H) bit allocation
IEN0 - Interrupt enable register 0 (address A8H) bit description
IEN1 - Interrupt enable register 1 (address E8H) bit allocation
IEN1 - Interrupt enable register 1 (address E8H) bit description
IP0 - Interrupt priority 0 low register (address B8H) bit allocation
IP0 - Interrupt priority 0 low register (address B8H) bit description
Symbol
EA
EC
ET2
ES
ET1
EX1
ET0
EX0
Symbol
-
EBO
-
Symbol
-
PPC
PT2
PS
PT1
PX1
PT0
PX0
EA
7
7
7
-
-
Rev. 01 — 01 March 2004
PPC
EC
6
6
6
-
Description
Interrupt Enable Bit: EA = 1 interrupt(s) can be serviced, EA = 0
interrupt servicing disabled.
PCA Interrupt Enable bit.
Timer 2 Interrupt Enable.
Serial Port Interrupt Enable
Timer 1 Overflow Interrupt Enable.
External Interrupt 1 Enable.
Timer 0 Overflow Interrupt Enable.
External Interrupt 0 Enable.
Description
Reserved for future use. Should be set to ‘0’ by user programs.
Brown-out Interrupt Enable. 1 = enable, 0 = disable.
Reserved for future use. Should be set to ‘0’ by user programs.
Description
Reserved for future use. Should be set to ‘0’ by user programs.
PCA Interrupt Priority Low Bit.
Timer 2 Interrupt Priority Low Bit.
Serial Port Interrupt Priority Low Bit.
Timer 1 Interrupt Priority Low Bit.
External Interrupt 1 Priority Low Bit.
Timer 0 Interrupt Priority Low Bit.
External Interrupt 0 Priority Low Bit.
ET2
PT2
5
5
5
-
ES
PS
4
4
4
-
8-bit microcontrollers with 80C51 core
EBO
ET1
PT1
3
3
3
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
EX1
PX1
P89V51RD2
2
2
2
-
ET0
PT0
1
1
1
-
EX0
PX0
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0
0
0
-