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參數(shù)資料
| 型號： | P89LPC936 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT SINGLE CHIP MICROCONTROLLERS |
| 中文描述： | 8位單晶片微控制器 |
| 文件頁數(shù)： | 47/75頁 |
| 文件大?。?/td> | 372K |
| 代理商： | P89LPC936 |
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9397 750 15113
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 06 — 20 June 2005
47 of 75
Philips Semiconductors
P89LPC933/934/935/936
8-bit microcontroller with accelerated two-clock 80C51 core
8.23.2
Comparator interrupt
Each comparator has an interrupt flag contained in its configuration register. This flag is
set whenever the comparator output changes state. The flag may be polled by software or
may be used to generate an interrupt. The two comparators use one common interrupt
vector. If both comparators enable interrupts, after entering the interrupt service routine,
the user needs to read the flags to determine which comparator caused the interrupt.
8.23.3
Comparators and power reduction modes
Either or both comparators may remain enabled when Power-down or Idle mode is
activated, but both comparators are disabled automatically in Total Power-down mode.
If a comparator interrupt is enabled (except in Total Power-down mode), a change of the
comparator output state will generate an interrupt and wake-up the processor. If the
comparator output to a pin is enabled, the pin should be configured in the push-pull mode
in order to obtain fast switching times while in Power-down mode. The reason is that with
the
oscillator
stopped, the temporary strong pull-up that normally occurs during switching
on a quasi-bidirectional port pin does not take place.
Comparators consume power in Power-down and Idle modes, as well as in the normal
operating mode. This fact should be taken into account when system power consumption
is an issue. To minimize power consumption, the user can disable the comparators via
PCONA.5, or put the device in Total Power-down mode.
8.24 Keypad interrupt
The Keypad Interrupt (KBI) function is intended primarily to allow a single interrupt to be
generated when Port 0 is equal to or not equal to a certain pattern. This function can be
used for bus address recognition or keypad recognition. The user can configure the port
via SFRs for different tasks.
The Keypad Interrupt Mask register (KBMASK) is used to define which input pins
connected to Port 0 can trigger the interrupt. The Keypad Pattern register (KBPATN) is
used to define a pattern that is compared to the value of Port 0. The Keypad Interrupt Flag
(KBIF) in the Keypad Interrupt Control register (KBCON) is set when the condition is
matched while the Keypad Interrupt function is active. An interrupt will be generated if
enabled. The PATN_SEL bit in the Keypad Interrupt Control register (KBCON) is used to
define equal or not-equal for the comparison.
In order to use the Keypad Interrupt as an original KBI function like in 87LPC76x series,
the user needs to set KBPATN = 0FFH and PATN_SEL = 1 (not equal), then any key
connected to Port 0 which is enabled by the KBMASK register will cause the hardware to
set KBIF and generate an interrupt if it has been enabled. The interrupt may be used to
wake-up the CPU from Idle or Power-down modes. This feature is particularly useful in
handheld, battery-powered systems that need to carefully manage power consumption
yet also need to be convenient to use.
In order to set the flag and cause an interrupt, the pattern on Port 0 must be held longer
than six CCLKs.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LPC9361FDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core, 4 kB/8 kB/16 kB 3 V byte-erasable flash with 8-bit ADCs |
| P89LPC9361FDH,518 | 功能描述:8位微控制器 -MCU MCU 8-Bit 80C51 8KB Flash 2.5V/3.3V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| P89LPC936FA | 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 16K FLASH PLCC28 |
| P89LPC936FA,529 | 功能描述:8位微控制器 -MCU 80C51 16K FL 768B RM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| P89LPC936FA529 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 18MHZ LCC-28 |
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