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| 型號(hào)： | P89V51RD2 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM |
| 中文描述： | 8位80C51的5 V低功耗64 kB閃存1 KB RAM內(nèi)存控制器 |
| 文件頁(yè)數(shù)： | 58/77頁(yè) |
| 文件大小： | 350K |
| 代理商： | P89V51RD2 |
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Philips Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 03 — 02 December 2004
58 of 77
9397 750 14341
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.11 Power-saving modes
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
Table 58
.
Table 52:
Not bit addressable; Reset value: 00H
Bit
7
Symbol
-
IP0H - Interrupt priority 0 high register (address B7H) bit allocation
6
5
4
3
2
1
0
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Table 53:
Bit
7
6
5
4
3
2
1
0
IP0H - Interrupt priority 0 high register (address B7H) bit description
Symbol
Description
-
Reserved for future use. Should be set to ‘0’ by user programs.
PPCH
PCA Interrupt Priority High Bit.
PT2H
Timer 2 Interrupt Priority High Bit.
PSH
Serial Port Interrupt Priority High Bit.
PT1H
Timer 1 Interrupt Priority High Bit.
PX1H
External Interrupt 1 Priority High Bit.
PT0H
Timer 0 Interrupt Priority High Bit.
PX0H
External Interrupt 0 Priority High Bit.
Table 54:
Bit addressable; Reset value: 00H
Bit
7
Symbol
-
IP1 - Interrupt priority 1 register (address F8H) bit allocation
6
-
5
-
4
3
-
2
-
1
-
0
-
PBO
Table 55:
Bit
7 to 5
4
3 to 0
IP1 - Interrupt priority 1 register (address F8H) bit description
Symbol
Description
-
Reserved for future use. Should be set to ‘0’ by user programs.
PBO
Brown-out interrupt priority bit.
-
Reserved for future use. Should be set to ‘0’ by user programs.
Table 56:
Not bit addressable; Reset value: 00H
Bit
7
Symbol
-
IP1H - Interrupt priority 1 high register (address F7H) bit allocation
6
-
5
-
4
3
-
2
-
1
-
0
-
PBOH
Table 57:
Bit
7 to 5
4
3 to 0
IP1H - Interrupt priority 1 high register (address F7H) bit description
Symbol
Description
-
Reserved for future use. Should be set to ‘0’ by user programs.
PBOH
Brown-out interrupt priority bit.
-
Reserved for future use. Should be set to ‘0’ by user programs.
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