【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
% f' n' ]' B+ k& z9 D  A一．正面：
" l8 e- e: b  w8 l3 M- I官方原文指导：
+ J3 l, U/ p1 }2 }% O: UThe 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
$ d- \5 v0 y% p6 `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
4 W1 ]! U  V& F9 z& N4.    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
6.    Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入
: v9 ]7 K4 n2 V9 A7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
% `# Q: f) i, t, w8 X. ]3 ~) S8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
7 c0 [6 z" h6 C1 {9.    HOST mode power jumper (J5).   电源模式跳线
3 d# j4 d0 v( d7 q10.  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   
' }& C6 L* _& _12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
( a9 @; S& l" B7 l1 s13.  USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。
0 B; G& P% k0 }- x3 G3 _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
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
  v4 g( `4 {( M% W- C( ZOTG/device-based applications (J3).       OTG,micro-USB连接器
4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
4 e3 Q' s' L- P( h7 B& g3 d基本情况就介绍到这儿，这个板子本身所带的资源及信息。

$ `9 {7 q7 L# z3 ]% L=======================================================================================================
三．性能及相关参数（捡主要的）
" k! c/ ~- s. m- m; i) w3 E0 p8 c3.1 power supply
: t6 }8 R6 S5 J! d. L•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
, b5 [- m  ]. x8 B" V) k•  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。
5 T2 T; A% O1 e) Ican 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，
•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.
: V: x7 `% u& I: L6 c0 r! C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
3 f+ h! @$ C5 i0 O& l% Obe removed.
+ `/ G) M- |/ J& M7 JDEBUG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
1 b# {6 A+ q+ D% T  \: a; G/ D" ~# Zbe 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……