- 您现在的位置：买卖IC网 > PDF目录122717 > 935267488112 (NXP SEMICONDUCTORS) 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDSO20 PDF资料下载
参数资料
| 型号： | 935267488112 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDSO20 |
| 封装： | 7.50 MM, PLASTIC, SO-20 |
| 文件页数： | 7/69页 |
| 文件大小： | 352K |
| 代理商： | 935267488112 |
第1页第2页第3页第4页第5页第6页当前第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页
Philips Semiconductors
Preliminary specification
87LPC768
Low power, low price, low pin count (20 pin) microcontroller with
4 kB OTP 8-bit A/D, Pulse Width Modulator
2000 May 02
13
Analog Comparators
Two analog comparators are provided on the 87LPC768. 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)
相关PDF资料 |
PDF描述 |
|---|---|
| 9ERS3165BGILF | 400 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO64 |
| 9LPRS535BFLFT | SPECIALTY MICROPROCESSOR CIRCUIT, PDSO48 |
| 935208500112 | 8-BIT, 16 MHz, MICROCONTROLLER, PDIP40 |
| 935208540112 | 8-BIT, 16 MHz, MICROCONTROLLER, PQCC44 |
| 935267591518 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 935268081112 | 制造商:NXP Semiconductors 功能描述:SUB ONLY IC |
| 935268721125 | 制造商:NXP Semiconductors 功能描述:Buffer/Line Driver 1-CH Non-Inverting 3-ST CMOS 5-Pin TSSOP T/R |
| 935269304128 | 制造商:ST-Ericsson 功能描述:IC AUDIO CODEC W/TCH SCRN 48LQFP |
| 935269544557 | 制造商:NXP Semiconductors 功能描述:SUB ONLY TDA9587-2US1-V1.3 |
| 935269987557 | 制造商:NXP Semiconductors 功能描述:SUB ONLY TDA9587-1US1-V1.8 SUBBED TO 935269987557 |
发布紧急采购，3分钟左右您将得到回复。