【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
) a" {* q/ T$ H' ]一．正面：
5 l8 i, ]! f0 o1 T3 o, O. g官方原文指导：
The top assembly of the board includes these key features, as indicated in Figure 1-1:
+ {1 ^8 _4 E' i5 [8 M* z7 @1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
2.    Green power indicator LED (D4).    电源指示灯
' U! D5 i# R9 q: B* i) r+ D3.    On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
8 U' j' }- j9 }! J  V4.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
# g% y. p/ g* F: |6 q- M5.    Debug indicator LED (D7).                 Debug指示灯
' I4 @% u# l7 v( @6.    Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入
' m* \7 l, r' w  w0 l4 g2 q/ c7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
7 P$ r6 A9 K4 [3 b1 B. L8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
) f& e9 X0 N9 T' o4 z4 H! g9.    HOST mode power jumper (J5).   电源模式跳线
7 I  ?, t+ y7 @- L10.  LAN8740A PHY Daughter Board headers (J2)     这个拿到板的人一看就明白,网络连接接口
: g; C% j0 K* m11.  50 MHz Ethernet PHY oscillator (Y3).  50MHZ晶振 没看文档前还以为是电容   
5 R" e& _2 c- \/ i4 `9 M12.  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。
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
OTG/device-based applications (J3).       OTG,micro-USB连接器
% f; x6 e8 ]/ ?5 R; S4 ]" K# B4.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。

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三．性能及相关参数（捡主要的）
  U. J1 A5 f8 f! u$ L$ Q3.1 power supply
2 U: {# [1 q( J+ e3 `6 m$ B+ f5 ~•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
6 K, `9 J  ~& P' ?•  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.
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.
) a/ @+ `& |2 w) g. A3 `4 p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
5 j  K: t: Q2 g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
+ o8 z3 }9 |+ q2 Z9 y9 F8 m" }; Ikit’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
; k+ H: {* i9 x4 A; Rbe 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
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.
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……