【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
一．正面：
官方原文指导：
) `5 _5 S; t+ {7 Q- Q9 PThe top assembly of the board includes these key features, as indicated in Figure 1-1:
) S/ }5 h8 P- L, n1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
  T5 C7 G! d2 h, m2.    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.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
1 I9 ]# C2 h0 U) Z' U6 M6 [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
( w; r9 r' |2 f7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
1 I+ D: F7 T( `1 ]/ b6 g7 l8.    USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
9.    HOST mode power jumper (J5).   电源模式跳线
; j& [3 Z0 _, \) b9 \! a! g10.  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   
- e$ F3 N! c6 q: u12.  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：
7 u$ N' e  g2 c. q( j1. Regulated +3.3V power supply for powering the starter kit through USB or
8 ]4 a# P. j4 H: [  j; f7 W( Rexpansion 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
; H' q: f% X* IOTG/device-based applications (J3).       OTG,micro-USB连接器
4.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。

( l6 A( b+ L+ v. A; ?. j=======================================================================================================
8 k8 L; c6 i) \6 A: B三．性能及相关参数（捡主要的）
0 |( v% ]) b  V- v3 u3.1 power supply
# T! d# Q$ z6 e•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
% O) M, W$ ^% _0 d) o2 L6 q8 N9 A•  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。
" m' _( U- X, M( k0 Q# X, ?5 |) tcan 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）
3 g2 L  w$ m4 f0 k5 h; X" fUSB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.
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
! P* q' [* H  }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
2 ^7 D4 R5 c' c& x7 K+ |be removed.
4 u! Z, g% @' kDEBUG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。
( R: B! D$ y+ J: H0 x: i•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
5 D# h* A' m3 o* d) ystarter 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 S7 ~" C) _7 x+ _- {4 g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……