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| 型號： | LPC2378 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Single-chip 16-bit/32-bit microcontrollers; 512 kB flash with ISP/IAP, Ethernet, USB 2.0, CAN, and 10-bit ADC/DAC |
| 中文描述： | 單芯片16-bit/32-bit微控制器，512的ISP /國際檢察官聯(lián)合會(huì)，以太網(wǎng)，USB 2.0，CAN和10 kB閃存位的ADC / DAC |
| 文件頁數(shù)： | 27/54頁 |
| 文件大?。?/td> | 203K |
| 代理商： | LPC2378 |
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LPC2378_1
NXP B.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 — 6 December 2006
27 of 54
NXP Semiconductors
LPC2378
Fast communication chip
–
Reset timer on match with optional interrupt generation.
Up to four external outputs corresponding to match registers, with the following
capabilities:
–
Set LOW on match.
–
Set HIGH on match.
–
Toggle on match.
–
Do nothing on match.
7.22 Pulse width modulator
The PWM is based on the standard Timer block and inherits all of its features, although
only the PWM function is pinned out on the LPC2378. The Timer is designed to count
cycles of the system derived clock and optionally switch pins, generate interrupts or
perform other actions when specified timer values occur, based on seven match registers.
The PWM function is in addition to these features, and is based on match register events.
The ability to separately control rising and falling edge locations allows the PWM to be
used for more applications. For instance, multi-phase motor control typically requires three
non-overlapping PWM outputs with individual control of all three pulse widths and
positions.
Two match registers can be used to provide a single edge controlled PWM output. One
match register (PWMMR0) controls the PWM cycle rate, by resetting the count upon
match. The other match register controls the PWM edge position. Additional single edge
controlled PWM outputs require only one match register each, since the repetition rate is
the same for all PWM outputs. Multiple single edge controlled PWM outputs will all have a
rising edge at the beginning of each PWM cycle, when an PWMMR0 match occurs.
Three match registers can be used to provide a PWM output with both edges controlled.
Again, the PWMMR0 match register controls the PWM cycle rate. The other match
registers control the two PWM edge positions. Additional double edge controlled PWM
outputs require only two match registers each, since the repetition rate is the same for all
PWM outputs.
With double edge controlled PWM outputs, specific match registers control the rising and
falling edge of the output. This allows both positive going PWM pulses (when the rising
edge occurs prior to the falling edge), and negative going PWM pulses (when the falling
edge occurs prior to the rising edge).
7.22.1
Features
LPC2378 has one PWM block with Counter or Timer operation (may use the
peripheral clock or one of the capture inputs as the clock source).
Seven match registers allow up to 6 single edge controlled or 3 double edge
controlled PWM outputs, or a mix of both types. The match registers also allow:
–
Continuous operation with optional interrupt generation on match.
–
Stop timer on match with optional interrupt generation.
–
Reset timer on match with optional interrupt generation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LPC2378FBD144 | 制造商:NXP Semiconductors 功能描述:MCU 32BIT ARM7 10/100 USB CAN 制造商:NXP Semiconductors 功能描述:MCU 32BIT ARM7, 10/100, USB, CAN |
| LPC2378FBD144,551 | 功能描述:ARM微控制器 - MCU ARM7 512KF/USB/ENET RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| LPC2378FBD144/CP32 | 制造商:NXP Semiconductors 功能描述:- Trays |
| LPC2378FBD144/CP3E | 制造商:NXP Semiconductors 功能描述: |
| LPC2378FBD144551 | 制造商:NXP Semiconductors 功能描述:IC 32BIT MCU ARM7 72MHZ LQFP-144 |
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