【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
- f- Z4 S# D6 S; y' n* Z一．正面：
官方原文指导：
$ `1 d  Q$ b+ p% e- {The top assembly of the board includes these key features, as indicated in Figure 1-1:
( M5 ?9 j# C4 l; L% x& u: r+ @1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
1 C- ?# `; Q& y9 W2.    Green power indicator LED (D4).    电源指示灯
9 s3 c5 Y$ u! A3 |8 M8 m3.    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
. F7 {0 m) y: m( l* |) [6 B: g5.    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
8 b4 B' l8 {3 K& `3 E* F/ j* A7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
  o5 ]: r7 v+ l+ a; n3 M3 L# x* Q8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
" C- I: q" [$ M+ j* ^, U( l9.    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
0 b) d+ G  @) k, h11.  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
# o2 h5 X4 ]+ K2 L1 J, u+ V  D8 B13.  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
expansion board (U8).   3.3V的电源支撑
: _% \1 k9 o- b0 K( x0 u- E2.Connector for various expansion boards (J1).  扩展板连接器
7 v) P  ^( d: A* D2 E3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
% U1 a- K) G# a7 J, V! ?. KOTG/device-based applications (J3).       OTG,micro-USB连接器
9 r: j6 @3 ^4 o7 G6 S  F. s9 I4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
) v. J! P% K5 u  Y2 \基本情况就介绍到这儿，这个板子本身所带的资源及信息。
" l' G3 a( m* \4 i3 ?* J
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三．性能及相关参数（捡主要的）
3.1 power supply
( e  x1 \5 \" T! @•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
( h8 u) G, v' x( 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。
can be connected to the J1 application board connector that is provided on the bottom side of the board.
% {6 d6 {  H& X5 W" I9 ~. M3.2 PIC32 USB Connectivity（USB连接）
' L$ H$ c6 m, |, {: B% UUSB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，
# r7 r# z. p7 n4 j' I; y1 |还有一种是OTG模式，
, e% W7 S5 Z) v1 H" x•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.
8 u, H9 E+ H- v8 M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
+ b$ m7 D4 d' Mkit’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
1 L+ i, T1 `7 obe 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。
' I* \' D4 a7 ~9 l9 }) 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
$ Q/ B/ M* {& q0 w+ k# dbe removed.
; z. ^5 i3 h( H' l! x0 W只需要连接J3,但J5跳线要断开。

Haiting32451

学习了……

helendcany

哦，哦，哦，这个要记……