【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
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:
9 j* ^6 t* i( k, |4 V. n% \1.    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
; @# w( }+ F  N( z: S( f- i% S& f4.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
5.    Debug indicator LED (D7).                 Debug指示灯
; W$ U- A  o+ C7 V: t6.    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 F; M- }1 J. W5 b! g; |: w  y8.    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
+ Y7 L3 w8 I7 N' E8 z; b# ~, R% y11.  50 MHz Ethernet PHY oscillator (Y3).  50MHZ晶振 没看文档前还以为是电容   
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。
- Z6 d5 B. ~% s. s) |! t二．反面：
1. Regulated +3.3V power supply for powering the starter kit through USB or
expansion board (U8).   3.3V的电源支撑
9 o9 Y7 A+ u: O2 t) d2.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 }  R$ E" S# v5 W  _  xOTG/device-based applications (J3).       OTG,micro-USB连接器
" v/ k# P/ z+ b, @7 e4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
4 X; X- x8 z" ^( p7 i) N; I( K基本情况就介绍到这儿，这个板子本身所带的资源及信息。

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; b8 p# |; Y  ]' H. c! X三．性能及相关参数（捡主要的）
3.1 power supply
•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
- |3 e' y, _: X* f, v•  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。
$ L5 h  w# u3 ]can be connected to the J1 application board connector that is provided on the bottom side of the board.
& t" W5 p( W$ `; U% d1 C+ M3.2 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，
6 O0 u# v" |7 d" e+ Y还有一种是OTG模式，
5 ?4 g  t7 N0 y•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
" {. B* N. }1 {* O# G& H, A( W$ Ojumper 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
7 ~2 J, C% ^; G9 G" `  z在面板上看到的那两个排针。
0 u+ C% }% \# W% ]7 O! {4 V" P•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
" p) l6 Z6 n6 Wkit’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.
0 k) w2 X0 C9 l9 X9 uDEBUG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。
% v: K  N7 Q0 W' b+ C1 R•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
8 V( c7 \; G" qstarter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should
4 [$ M; g9 k& u+ Ibe removed.
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……