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參數(shù)資料
| 型號(hào)： | P89LPC914FDH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM |
| 中文描述： | 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PDSO14 |
| 封裝： | 4.4 MM, PLASTIC, MO-153, SOT-402-1, TSSOP-14 |
| 文件頁數(shù)： | 43/63頁 |
| 文件大?。?/td> | 314K |
| 代理商： | P89LPC914FDH |
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Philips Semiconductors
P89LPC912/913/914
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 03 — 17 December 2004
43 of 63
9397 750 14468
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.19 Analog comparators
Two analog comparators are provided on the P89LPC912/913/914. Input and output
options allow use of the comparators in a number of different configurations.
Comparator operation is such that the output is a logical ‘1’ when the positive input is
greater than the negative input (selectable from a pin or an internal reference
voltage). Otherwise the output is a zero. Each comparator may be configured to
cause an interrupt when the output value changes. Comparator 1 may be output to a
port pin.
The overall connections to both comparators are shown in
Figure 21
. The
comparators function to V
DD
= 2.4 V.
When each comparator is first enabled, the comparator output and interrupt flag are
not guaranteed to be stable for 10 microseconds. The corresponding comparator
interrupt should not be enabled during that time, and the comparator interrupt flag
must be cleared before the interrupt is enabled in order to prevent an immediate
interrupt service.
9.20 Internal reference voltage
An internal reference voltage generator may supply a default reference when a single
comparator input pin is used. The value of the internal reference voltage, referred to
as V
REF
, is 1.23 V
±
10 %.
9.21 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.
Possible comparator configurations are shown in
Figure 22
.
Fig 21. Comparator input and output connections.
Comparator 1
CN1
(P0.4) CIN1A
(P0.5) CMPREF
VREF
OE1
Change Detect
CO1
CMF1
Interrupt
002aaa496
CMP1 (P0.6)
EC
Change Detect
CMF2
Comparator 2
CN2
(P0.2) CIN2A
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| P89LPC914FDH,129 | 功能描述:8位微控制器 -MCU PREF PART P89LPC913FDH-S 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| P89LPC914FDH-S | 功能描述:8位微控制器 -MCU PREF PART P89LPC913FDH-S 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| P89LPC915 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with accelerated two-clock 80C51 core 2 kB 3 V Flash with 8-bit A/D converter |
| P89LPC9151 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core, 2 kB 3 V byte-erasable flash with 8-bit ADC |
| P89LPC9151FDH | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core, 2 kB 3 V byte-erasable flash with 8-bit ADC |
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