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參數(shù)資料
| 型號(hào)： | P89LV51RD2BN |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| 中文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | 0.600 INCH, PLASTIC, MO-015, SOT-129-1, DIP-40 |
| 文件頁(yè)數(shù)： | 53/77頁(yè) |
| 文件大小： | 349K |
| 代理商： | P89LV51RD2BN |
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Philips Semiconductors
P89LV51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 04 — 02 December 2004
53 of 77
9397 750 14342
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
7.8.4
Pulse width modulator mode
All of the PCA modules can be used as PWM outputs (
Figure 26
). Output frequency
depends on the source for the PCA timer.
All of the modules will have the same frequency of output because they all share one
and only PCA timer. The duty cycle of each module is independently variable using
the module’s capture register CCAPnL.When the value of the PCA CL SFR is less
than the value in the module’s CCAPnL SFR the output will be low, when it is equal to
or greater than the output will be high. When CL overflows from FF to 00, CCAPnL is
reloaded with the value in CCAPnH. this allows updating the PWM without glitches.
The PWM and ECOM bits in the module’s CCAPMn register must be set to enable
the PWM mode.
7.8.5
PCA Watchdog timer
An on-board Watchdog timer is available with the PCA to improve the reliability of the
system without increasing chip count. Watchdog timers are useful for systems that
are susceptible to noise, power glitches, or electrostatic discharge. Module 4 is the
only PCA module that can be programmed as a Watchdog. However, this module can
still be used for other modes if the Watchdog is not needed.
Figure 26
shows a
diagram of how the Watchdog works. The user pre-loads a 16-bit value in the
compare registers. Just like the other compare modes, this 16-bit value is compared
to the PCA timer value. If a match is allowed to occur, an internal reset will be
generated. This will not cause the RST pin to be driven high.
user’s software then must periodically change (CCAP4H,CCAP4L) to keep a match
from occurring with the PCA timer (CH,CL). This code is given in the WATCHDOG
routine shown above.
In order to hold off the reset, the user has three options:
Fig 26. PCA PWM mode.
002aaa541
-
ECOMn
0
1
0
0
0
1
1
CAPPn
CAPNn
MATn
TOGn
PWMn
ECCFn
CCAPMn, n = 0 to 4
(DAH to DEH)
CCAPnL
8-BIT COMPARATOR
PCA timer/counter
CCAPnH
CL
enable
CEXn
CL
<
CCAPnL
CL
≥
CCAPnL
0
1
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| P89LV51RD2BA | 8-bit 80C51 3 V low power 64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RC2 | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RC2BN | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RC2FA | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LV51RD2BN,112 | 功能描述:8位微控制器 -MCU 3V 64K/1K FL 12/6 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 |
| P89LV51RD2FA | 功能描述:8位微控制器 -MCU 3V 64K/1K FL 12/6 CLK ISP/IAP 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 |
| P89LV51RD2FA,512 | 功能描述:8位微控制器 -MCU 3V 64K/1K FL 12/6 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 |
| P89V51RB2 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RB2_09 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller with 1 kB RAM |
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