【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
: ^, l, P3 }/ f% k# q一．正面：
官方原文指导：
The top assembly of the board includes these key features, as indicated in Figure 1-1:
+ z& K8 [9 K! l3 k% T1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
2.    Green power indicator LED (D4).    电源指示灯
3.    On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
4.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
) ^0 \$ |& w" O6 l$ ~2 e5.    Debug indicator LED (D7).                 Debug指示灯
6.    Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入
7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
0 {5 }& b8 k# K9 j; n; I6 b8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
9.    HOST mode power jumper (J5).   电源模式跳线
10.  LAN8740A PHY Daughter Board headers (J2)     这个拿到板的人一看就明白,网络连接接口
11.  50 MHz Ethernet PHY oscillator (Y3).  50MHZ晶振 没看文档前还以为是电容   
) a' G+ e& C2 g6 u' @12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
13.  USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。
8 A' b5 M* X- {( y' Y6 U二．反面：
: I7 b& d: p9 O9 q: `6 L( u1. Regulated +3.3V power supply for powering the starter kit through USB or
  e1 }# Q7 Z- z% f& C% j0 R) nexpansion board (U8).   3.3V的电源支撑
2.Connector for various expansion boards (J1).  扩展板连接器
3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
9 Z; K1 w# I6 \8 U3 @0 [! j: U  bOTG/device-based applications (J3).       OTG,micro-USB连接器
2 I$ {' E$ R1 u3 W4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
基本情况就介绍到这儿，这个板子本身所带的资源及信息。

& {' t  ]- Y% G8 i9 U=======================================================================================================
' m8 L6 J! |; l三．性能及相关参数（捡主要的）
8 z  W% N0 J5 ]/ x) f# s3.1 power supply
•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
•  An external application board with a regulated DC power supply that provides +5V  J1也就是板子背面最大的那个接扩展板的接口接供，暂不满足。
can be connected to the J1 application board connector that is provided on the bottom side of the board.
! w4 T) p4 b% l7 h6 k3.2 PIC32 USB Connectivity（USB连接）
USB连接有3种模式，像大家最常用U盘，接到PC上，这种U盘就属于DEVICE MODE，PC就属于HOST MODE这种是大家最常用到的，
还有一种是OTG模式，
•HOST Mode – Connect the device to the Type A connector J4, located on the top side of the starter kit. If using the Debug USB port to power the Host port, install
/ ~1 k- ^9 c- i' `9 ajumper J5 to short the back-power prevention diode. Note that a maximum of  ~400 mA can be supplied from the Debug USB port to the Host port using this method.
如果想要使用USB主机模式，那么必需就要接到J4上，也就是那个我们最常见的USB口上，如果是用MICRO-USB供电，则需要短接J5,也就是我们
- x. @- E- q% J; x6 I3 L" H3 K在面板上看到的那两个排针。
•DEVICE Mode – Connect the debug mini-B USB cable to port J7 and then connect the starter kit to the host using a cable with a Type-B micro-plug to the starter
/ K; M8 p& {8 y: o; d; lkit’s micro-A/B port J3, located on the bottom side of the starter kit. The other end of the cable must have a Type-A plug. Connect it to a USB host. Jumper J5 should
be removed.
DEBUG口，即是设备模式，但是需要将j7,跟J3都连接到电脑，J5也就是那个跳线需要断开。
•OTG Mode – Connect the starter kit to the OTG device using an OTG micro-A/B cable to the micro-A/B port J3, located on the bottom side of the starter kit. The
. f+ A% w/ i* \, X7 m0 Cstarter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should
be removed.
8 y$ K  r& r% j7 W" q" c. d( U3 x6 n4 y只需要连接J3,但J5跳线要断开。

helendcany

哦，哦，哦，这个要记……

Haiting32451

学习了……