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MPLAB Starter Kit for PIC18F User’s Guide
The microcontroller uses one of its A/D Converter channels to sample and convert the
potentiometer ’s value to a digital value. Four additional A/D channels are used to
monitor the directional touch pads of S1. The values from these channels are analyzed
with the CTMU to determine when a touch-and-release event occurs on any of the
pads. The application firmware determines which action to take based on the
application’s current context. For example, the capacitive buttons are used as Left and
Right buttons for the USB HID Mouse Demo, while the capacitive slider is used to
emulate the scroll wheel. The capacitive slider is also used by the USB HID Joystick
Demo to generate the Z axes coordinates.
The microcontroller uses the SPI interface to configure the BMA150 acceleration
sensor, then to read 3-axis acceleration and temperature data in digital format. The
acceleration data is used to compute the board’s tilt; this is converted to cursor
movements for the USB HID Mouse Demo and X-Y coordinates for the USB HID
Joystick Demo.
The microcontroller uses the same SPI interface to communicate with the MicroSD
memory card. This allows the USB MSD Card Reader Demo to read and write files to
any MicroSD memory card.
The microcontroller directly drives the OLED display (LED1) using the microcontroller’s
Parallel Master Port (PMP). Data is driven on I/O ports, RD<7:0>. Port control signals,
A0, RD, WR and CS, are provided on ports RB5 and RE<2:0>, respectively. A DC
boost circuit, comprised of power MOSFET Q4 along with D5 and L3, provides the
operating voltage for the OLED.
The microcontroller uses its on-chip USB engine and transceiver to communicate with
the mini-B receptacles on the application side.
4.2
PROGRAMMER/DEBUGGER FUNCTIONAL OVERVIEW
FIGURE 4-2:
STARTER KIT PROGRAMMER/DEBUGGER BLOCK DIAGRAM
Debug
LED
12 MHz
Crystal
From Host PC
USB mini-B
Jack
USB Data
PIC18F67J50
ICSP?
To Application Side
(PIC18F46J50)
SPI
Serial EEPROM
25LC010A
In its default configuration, the starter kit functions as a USB bus-powered device.
Power is provided via the USB cable; the nominal 5 volt unregulated supply is regulated
by a Microchip MC1727 3.3 volt, Low Dropout (LDO) linear regulator. Proper main
system power is indicated by the green LED (D2).
DS51852A-page 24
? 2009 Microchip Technology Inc.
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相关代理商/技术参数
DM1800-434MB
功能描述:射频模块 DM1800 Base Station 433.92 MHz
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MN
功能描述:射频模块 DM1800 Field Node 433.92 MHz
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MN-V
功能描述:射频模块 Field Node w/ Host Ser Intr 433.92 MHz
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MR
功能描述:射频模块 DM1800 Network Router 433.92 MHz
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MR-PAH
功能描述:射频模块 DM1800 Pkg Router 433.92 MHz Horzt Mnt
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MR-PAV
功能描述:射频模块 DM1800 Pkg Router 433.92 MHz Vert Mnt
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MR-PBH
功能描述:射频模块 DM1800 Pkg Router 433.92 MHz Horzt Mnt
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
DM1800-434MR-PBV
功能描述:射频模块 DM1800 Pkg Router 433.92 MHz Vert Mnt
RoHS:否 制造商:Linx Technologies 产品:Transceiver Modules 频带:902 MHz to 928 MHz 输出功率:- 15.5 dBm to + 12.5 dBm 接口类型:UART 工作电源电压:- 0.3 VDC to + 5.5 VDC 传输供电电流:38.1 mA 接收供电电流:22.7 mA 天线连接器类型:U.FL 最大工作温度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm