參數(shù)資料
型號(hào): P89C51UBBB
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 微控制器/微處理器
英文描述: 80C51 8-bit microcontroller family 4K/8K/16K/32K Flash
中文描述: 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁(yè)數(shù): 32/68頁(yè)
文件大?。?/td> 404K
代理商: P89C51UBBB
Philips Semiconductors
Preliminary data
P89C51RA2/RB2/RC2/RD2xx
80C51 8-bit Flash microcontroller family
8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM
2002 Jul 18
32
PX0
IP (0B8H)
Priority Bit = 1 assigns high priority
Priority Bit = 0 assigns low priority
BIT
IP.7
IP.6
IP.5
IP.4
IP.3
IP.2
IP.1
IP.0
SYMBOL
PPC
PT2
PS
PT1
PX1
PT0
PX0
FUNCTION
PCA interrupt priority bit
Timer 2 interrupt priority bit.
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.
SU01291
PT0
PX1
PT1
PS
PT2
PPC
0
1
2
3
4
5
6
7
Figure 22. IP Registers
PX0H
IPH (B7H)
Priority Bit = 1 assigns higher priority
Priority Bit = 0 assigns lower priority
BIT
IPH.7
IPH.6
IPH.5
IPH.4
IPH.3
IPH.2
IPH.1
IPH.0
SYMBOL
PPCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
FUNCTION
PCA interrupt priority bit
Timer 2 interrupt priority bit high.
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.
SU01292
PT0H
PX1H
PT1H
PSH
PT2H
PPCH
0
1
2
3
4
5
6
7
Figure 23. IPH Registers
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