【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
一．正面：
' {% ^+ x0 P, ^5 o! w7 s官方原文指导：
* r9 J) a7 M3 O+ x( EThe 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
+ ]6 a* c' [: V, }5 |$ `2.    Green power indicator LED (D4).    电源指示灯
5 m# R9 e" @* W3 b* E! \; v3.    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
6 B- U8 h$ M2 {/ b+ O# _5.    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
8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
( X- @8 o/ f2 ^9 C. x9.    HOST mode power jumper (J5).   电源模式跳线
8 ^1 }& t2 Q+ E' N1 Z- Y3 F1 Z8 l& f10.  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   
12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
/ X5 D( L5 c: G9 O! X% E$ G13.  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
5 b% ^3 ^  P+ r' ]' p8 _  f1 J/ Pexpansion board (U8).   3.3V的电源支撑
$ r5 v' D" B% P# _. a& y2.Connector for various expansion boards (J1).  扩展板连接器
; |, u: Z% {* C& a1 r3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
OTG/device-based applications (J3).       OTG,micro-USB连接器
4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
' }, O  d  `* m8 h  C$ O0 W基本情况就介绍到这儿，这个板子本身所带的资源及信息。
' ?2 J% }/ m1 `4 N, ?6 `5 K- o0 E
=======================================================================================================
三．性能及相关参数（捡主要的）
3.1 power supply
% R$ E, `1 {/ g# p8 Z•  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.
1 o* O6 t. |  L! ?3.2 PIC32 USB Connectivity（USB连接）
- T. x5 ?# o% t9 ^( X2 E3 cUSB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
) Q" m5 M  `8 z" Z' M" Wjumper 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
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。
4 [. z6 v1 X, S* S. @7 [( d•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
be removed.
8 d! ]' {) F4 E' O/ A& d5 B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……