参数资料
型号: TS87C54X2-VIED
英文描述: MICROCONTROLLER|8-BIT|8051 CPU|CMOS|QFP|44PIN|PLASTIC
中文描述: 单片机| 8位| 8051处理器|的CMOS | QFP封装| 44PIN |塑料
文件页数: 37/74页
文件大小: 689K
代理商: TS87C54X2-VIED
42
Rev. C - 06 March, 2001
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
Table 20. IP Register
IP - Interrupt Priority Register (B8h)
Reset Value = X000 0000b
Bit addressable
7
6
5
4
3
2
1
0
-
PPC
PT2
PS
PT1
PX1
PT0
PX0
Bit Number
Bit
Mnemonic
Description
7
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6
PPC
PCA interrupt priority bit
Refer to PPCH for priority level.
5
PT2
Timer 2 overow interrupt Priority bit
Refer to PT2H for priority level.
4
PS
Serial port Priority bit
Refer to PSH for priority level.
3
PT1
Timer 1 overow interrupt Priority bit
Refer to PT1H for priority level.
2
PX1
External interrupt 1 Priority bit
Refer to PX1H for priority level.
1
PT0
Timer 0 overow interrupt Priority bit
Refer to PT0H for priority level.
0
PX0
External interrupt 0 Priority bit
Refer to PX0H for priority level.
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