【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
+ X1 U# C9 ^! ~" H" }' @一．正面：
' N7 |' D* g: Q3 ~  g官方原文指导：
$ v& q4 R' V  N5 Q+ m0 `2 Z' OThe 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
2.    Green power indicator LED (D4).    电源指示灯
( \7 D; [0 K$ Y+ _1 f4 z3.    On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
" P1 X& ]' H+ V0 z/ {5 m4.    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
8 K. {) v/ z9 Q% s8 }4 U& ?3 b  \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
( \% g" y/ i9 D/ C2 Z- {+ F8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
0 O9 R: P4 R4 B- V, u8 Y" i  [, p9.    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
% y) I* l9 P  o" b, ?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
  u; C' W' D  k6 q13.  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：
. P: q) p" K7 |( K. Z7 q1. Regulated +3.3V power supply for powering the starter kit through USB or
: V: W3 u0 \4 L, D$ \expansion 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
OTG/device-based applications (J3).       OTG,micro-USB连接器
* T' u# d& B" r! ^" i, k4.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。

, y5 z/ \! J* y) h  F! w- [=======================================================================================================
& ?5 N4 E+ c9 S9 n; A+ m# S( F三．性能及相关参数（捡主要的）
6 J, u! d& X* l4 i! x! D3.1 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。
$ |  V( L- J% j: T# a( Gcan be connected to the J1 application board connector that is provided on the bottom side of the board.
3.2 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，
3 ~# s/ y4 u/ B/ O+ u$ i•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
jumper 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.
: t/ b1 ?& u  L' `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
# T" e$ a) n7 E3 Y' z; }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
7 V' ]; a) i# M6 Hstarter 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.
1 S5 x. i4 r# L, c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……