【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
4 m0 r5 a7 A' V' {/ z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:
1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
9 P4 }' \# t2 U* u9 E6 q2.    Green power indicator LED (D4).    电源指示灯
  y. n# H$ m" `2 C% E3.    On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
. u$ J7 R3 ^  v9 Z6 ^4.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
6 ~8 n% {' F2 K8 o" Z5.    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
7 q7 }4 t* q, Q' c+ N+ n8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
) v2 D" o7 T- w( [( b9.    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   
' V2 ?0 ?* J( }+ c( i1 k* B12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
) b9 ~8 q/ u( K! k% D13.  USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。
二．反面：
1. Regulated +3.3V power supply for powering the starter kit through USB or
8 C7 @- _: [- e9 _' L3 aexpansion 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
, Z( x9 X6 q) s/ kOTG/device-based applications (J3).       OTG,micro-USB连接器
4.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。
5 u6 e2 _- B$ f9 _7 L/ f
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三．性能及相关参数（捡主要的）
3.1 power supply
* e1 }* Y: e# R* ?) x$ W0 V; O•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
0 H( v% u! L8 b•  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。
" s' o& O3 O5 ^2 Z" E* x) Lcan be connected to the J1 application board connector that is provided on the bottom side of the board.
/ {" [& }/ m8 E! p3.2 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
  \2 h3 Z! ~4 z, m  o6 n) o5 yjumper 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.
( N% V! A& Q& h6 D& T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
5 n5 f+ G& L2 V& P' ~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
kit’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
starter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should
  r+ g: o# H" q. jbe removed.
6 l) ]! C7 e& P7 p7 _, R! {  e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……