- 您现在的位置：买卖IC网 > PDF目录17127 > EA-OEM-410 (Embedded Artists)KIT LPC3250 259 WITH QVGA PDF资料下载
参数资料
| 型号： | EA-OEM-410 |
| 厂商： | Embedded Artists |
| 文件页数： | 36/57页 |
| 文件大小： | 0K |
| 描述： | KIT LPC3250 259 WITH QVGA |
| 标准包装： | 1 |
| 类型： | MCU |
| 适用于相关产品： | LPC3250 |
| 所含物品： | 基板，线缆，OEM 板，序列号 |
第1页第2页第3页第4页第5页第6页第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页当前第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
LPC3220_30_40_50
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 20 October 2011
41 of 79
NXP Semiconductors
LPC3220/30/40/50
16/32-bit ARM microcontrollers
7.9.2 Keyboard scanner
The keyboard scanner function can automatically scan a keyboard of up to 64 keys in an
8
8 matrix. In operation, the keyboard scanner’s internal state machine will normally be
in an idle state, with all KEY_ROWn pins set high, waiting for a change in the column
inputs to indicate that one or more keys have been pressed.
When a keypress is detected, the matrix is scanned by setting one output pin high at a
time and reading the column inputs. After de-bouncing, the keypad state is stored and an
interrupt is generated. The keypad is then continuously scanned waiting for ‘extra key
pressed’ or ‘key released’. Any new keypad state is scanned and stored into the matrix
registers followed by a new interrupt request to the interrupt controller. It is possible to
detect and separate up to 64 multiple keys pressed.
7.9.2.1
Features
Supports up to 64 keys in 8 8 matrix.
Programmable de-bounce period.
A key press can wake up the CPU from Stop mode.
7.9.3 Touch screen controller and 10-bit ADC
The LPC3220/30/40/50 microcontrollers includes Touch Screen Controller (TSC)
hardware, which automatically measures and determines the X and Y coordinates where
a touch screen is pressed. In addition, the TSC can measure an analog input signal on the
AUX_IN pin.
Optionally, the TSC can operate as an Analog-to-Digital Converter (ADC). The ADC
supports three channels and uses 10-bit successive approximation to produce results with
a resolution of 10 bits in 11 clock cycles.
The analog portion of the ADC has its own power supply to enhance the low noise
characteristics of the converter. This voltage is only supplied internally when the core has
voltage. However, the ADC block is not affected by any difference in ramp-up time for
VDD_AD and VDD_CORE voltage supplies.
7.9.3.1
Features
Measurement range of 0 V to VDD_AD (nominally 3.3 V).
Low-noise ADC.
10-bit resolution.
Three input channels.
Uses 32 kHz RTC clock or peripheral clock.
7.9.4 Real-Time Clock (RTC) and battery RAM
The RTC runs at 32768 Hz using a very low power oscillator. The RTC counts seconds
and can generate alarm interrupts that can wake up the device from Stop mode. The RTC
clock can also clock the 397x PLL, the Millisecond Timer, the ADC, the Keyboard Scanner
and the PWMs. The RTC up-counter value represents a number of seconds elapsed since
second 0, which is an application determined time. The RTC counter will reach maximum
value after about 136 years. The RTC down-counter is initiated with all ones.
相关PDF资料 |
PDF描述 |
|---|---|
| VI-J7P-EZ | CONVERTER MOD DC/DC 13.8V 25W |
| L04021R8BHNTR | INDUCTOR THIN FILM 1.8NH 0402 |
| EEM22DTAI-S189 | CONN EDGECARD 44POS R/A .156 SLD |
| EEM36DRKS | CONN EDGECARD 72POS DIP .156 SLD |
| GEM22DCAD | CONN EDGECARD 44POS R/A .156 SLD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EA-OEM-411 | 功能描述:开发板和工具包 - ARM LPC3250 DEVELOPMENT KIT V2 RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| EA-OEM-509 | 功能描述:开发板和工具包 - ARM DEVELOPMENT KIT LPC1788-32 RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| EA-OEM-510 | 功能描述:开发板和工具包 - ARM DEVELOPMENT KIT LPC4088 RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| EA-OEM-511 | 功能描述:开发板和工具包 - ARM DEVELOPMENT KIT LPC4357 RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| EAORF2-10M | 制造商:Shure 功能描述:Medium Orange Foam (5 pair). |
发布紧急采购，3分钟左右您将得到回复。