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| 型号： | P87LPC768BD,512 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 7/65页 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU 4K OTP 20-SOIC |
| 产品培训模块： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 标准包装： | 38 |
| 系列： | LPC700 |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 20MHz |
| 连通性： | I²C，UART/USART |
| 外围设备： | 欠压检测/复位，LED，POR，PWM，WDT |
| 输入/输出数： | 18 |
| 程序存储器容量： | 4KB（4K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 128 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 6 V |
| 数据转换器： | A/D 4x8b |
| 振荡器型： | 内部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 706 (CN2011-ZH PDF) |
| 其它名称： | 568-3218-5 935267360512 P87LPC768BD |
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Philips Semiconductors
Preliminary data
P87LPC768
Low power, low price, low pin count (20 pin) microcontroller
with 4 kB OTP 8-bit A/D, Pulse Width Modulator
2002 Mar 12
13
Analog Comparators
Two analog comparators are provided on the P87LPC768. 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 one (which may be read in a register and/or routed to a pin)
when the positive input (one of two selectable pins) 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 Configuration
Each comparator has a control register, CMP1 for comparator 1 and
CMP2 for comparator 2. The control registers are identical and are
shown in Figure 4.
The overall connections to both comparators are shown in Figure 5.
There are eight possible configurations for each comparator, as
determined by the control bits in the corresponding CMPn register:
CPn, CNn, and OEn. These configurations are shown in Figure 6.
The comparators function down to a VDD of 3.0V.
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.
BIT
SYMBOL
FUNCTION
CMPn.7, 6
—
Reserved for future use. Should not be set to 1 by user programs.
CMPn.5
CEn
Comparator enable. When set by software, the corresponding comparator function is enabled.
Comparator output is stable 10 microseconds after CEn is first set.
CMPn.4
CPn
Comparator positive input select. When 0, CINnA is selected as the positive comparator input. When
1, CINnB is selected as the positive comparator input.
CMPn.3
CNn
Comparator negative input select. When 0, the comparator reference pin CMPREF is selected as
the negative comparator input. When 1, the internal comparator reference Vref is selected as the
negative comparator input.
CMPn.2
OEn
Output enable. When 1, the comparator output is connected to the CMPn pin if the comparator is
enabled (CEn = 1). This output is asynchronous to the CPU clock.
CMPn.1
COn
Comparator output, synchronized to the CPU clock to allow reading by software. Cleared when the
comparator is disabled (CEn = 0).
CMPn.0
CMFn
Comparator interrupt flag. This bit is set by hardware whenever the comparator output COn changes
state. This bit will cause a hardware interrupt if enabled and of sufficient priority. Cleared by
software and when the comparator is disabled (CEn = 0).
CMFn
SU01152
COn
OEn
CNn
CPn
CEn
—
0
1
2
3
4
5
6
7
CMPn
Reset Value: 00h
Not Bit Addressable
Address: ACh for CMP1, ADh for CMP2
Figure 4. Comparator Control Registers (CMP1 and CMP2)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| P87LPC768BN | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D,and Pulse Width Modulator |
| P87LPC768FD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D,and Pulse Width Modulator |
| P87LPC768FD,512 | 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP ADC RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| P87LPC768FN | 制造商:NXP Semiconductors 功能描述:MCU 8-Bit 87LP 80C51 CISC 4KB EPROM 5V 20-Pin PDIP |
| P87LPC768FN,112 | 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP ADC RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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