P89V51RD2 Philips Semiconductors, P89V51RD2 Datasheet - Page 56

• 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
7.11 Power-saving modes
Table 50:
Not bit addressable; Reset value: 00H
Table 51:
Table 52:
Bit addressable; Reset value: 00H
Table 53:
Table 54:
Not bit addressable; Reset value: 00H
Table 55:
The device provides two power saving modes of operation for applications where power
consumption is critical. The two modes are idle and Power-down, see
Bit
7
6
5
4
3
2
1
0
Bit
7 to 5
4
3 to 0
Bit
7 to 5
4
3 to 0
Bit
Symbol
Bit
Symbol
Bit
Symbol
IP0H - Interrupt priority 0 high register (address B7H) bit allocation
IP0H - Interrupt priority 0 high register (address B7H) bit description
IP1 - Interrupt priority 1 register (address F8H) bit allocation
IP1 - Interrupt priority 1 register (address F8H) bit description
IP1H - Interrupt priority 1 high register (address F7H) bit allocation
IP1H - Interrupt priority 1 high register (address F7H) bit description
Symbol
-
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Symbol
-
PBO
-
Symbol
-
PBOH
-
7
7
7
-
-
-
Rev. 01 — 01 March 2004
PPCH
6
6
6
-
-
Description
Reserved for future use. Should be set to ‘0’ by user programs.
PCA Interrupt Priority High Bit.
Timer 2 Interrupt Priority High Bit.
Serial Port Interrupt Priority High Bit.
Timer 1 Interrupt Priority High Bit.
External Interrupt 1 Priority High Bit.
Timer 0 Interrupt Priority High Bit.
External Interrupt 0 Priority High Bit.
Description
Reserved for future use. Should be set to ‘0’ by user programs.
Brown-out interrupt priority bit.
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.
Brown-out interrupt priority bit.
Reserved for future use. Should be set to ‘0’ by user programs.
PT2H
5
5
5
-
-
PBOH
PBO
PSH
4
4
4
8-bit microcontrollers with 80C51 core
PT1H
3
3
3
-
-
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
PX1H
P89V51RD2
2
2
2
-
-
Table
PT0H
1
1
1
-
-
56.
PX0H
56 of 75
0
0
0
-
-