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| 型號： | P87LPC768FN,112 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 5/65頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC 80C51 MCU 4K OTP 20-DIP |
| 產(chǎn)品培訓(xùn)模塊： | Migrating from 8/16-Bit MCUs to 32-Bit ARMs |
| 標(biāo)準(zhǔn)包裝： | 18 |
| 系列： | LPC700 |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 20MHz |
| 連通性： | I²C，UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，LED，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 18 |
| 程序存儲器容量： | 4KB（4K x 8） |
| 程序存儲器類型： | OTP |
| RAM 容量： | 128 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 4x8b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 20-DIP（0.300"，7.62mm） |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 706 (CN2011-ZH PDF) |
| 其它名稱： | 568-3220-5 935267488112 P87LPC768FN |
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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
11
Table 1. Example A/D Conversion Times
CPU Clock Rate
RCCLK = 0
RCCLK = 1
CPU Clock Rate
RCCLK = 0
minimum
nominal
maximum
32 kHz
NA
563.4
s
659
s
757
s
1 MHz
186
s
32.4
s
39.3
s
48.9
s
4 MHz
46.5
s
18.9
s
23.6
s
30.1
s
11.0592 MHz
16.8
s
16
s
20.2
s
27.1
s
12 MHz
15.5
s
16 MHz
11.6
s
20 MHz
9.3
s
Note: Do not clock ADC from the RC oscillator when MCU clock is greater than 4 MHz.
AD0 (P0.3)
AD1 (P0.4)
VREF+ = VDD
AADR1
AD2 (P0.5)
AD3 (P0.6)
00
01
10
11
VREF- = VSS
ADCON
A/D Converter
AADR0
DAC0
(A/D result)
SU01356
Figure 3. A/D Converter Connections
The A/D in Power Down and Idle Modes
While using the CPU clock as the A/D clock source, the Idle mode
may be used to conserve power and/or to minimize system noise
during the conversion. CPU operation will resume and Idle mode
terminate automatically when a conversion is complete if the A/D
interrupt is active. In Idle mode, noise from the CPU itself is
eliminated, but noise from the oscillator and any other on-chip
peripherals that are running will remain.
The CPU may be put into Power Down mode when the A/D is
clocked by the on-chip RC oscillator (RCCLK=1). This mode gives
the best possible A/D accuracy by eliminating most on-chip noise
sources.
If the Power Down mode is entered while the A/D is running from the
CPU clock (RCCLK=0), the A/D will abort operation and will not
wake up the CPU. The contents of DAC0 will be invalid when
operation does resume.
When an A/D conversion is started, Power Down or Idle mode must
be activated within two machine cycles in order to have the most
accurate A/D result. These two machine cycles are counted at the
CPU clock rate. When using the A/D with either Power Down or Idle
mode, care must be taken to insure that the CPU is not restarted by
another interrupt until the A/D conversion is complete. The possible
causes of wakeup are different in Power Down and Idle modes.
A/D accuracy is also affected by noise generated elsewhere in the
application, power supply noise, and power supply regulation. Since
the P87LPC768 power pins are also used as the A/D reference and
supply, the power supply has a very direct affect on the accuracy of
A/D readings. Using the A/D without Power Down mode while the
clock is divided through the use of CLKR or DIVM has an adverse
effect on A/D accuracy.
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相關(guān)代理商/技術(shù)參數(shù) |
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| P87LPC769 | 制造商:PHILIPS 制造商全稱: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 DAC |
| P87LPC769HD | 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 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(fēng)格:SMD/SMT |
| P87LPC769HD,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 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(fēng)格:SMD/SMT |
| P87LPC769HD,518 | 功能描述:8位微控制器 -MCU 20 PIN MCU 4KBYTE OTP 8-BIT A/D DAC 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(fēng)格:SMD/SMT |
| P87LPC769HD512 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:IC-SM-8-BIT MCU |
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