【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
一．正面：
官方原文指导：
The 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
% c5 P9 R. }' a2.    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
5.    Debug indicator LED (D7).                 Debug指示灯
" K; H7 `% u6 n' B) `5 v6.    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
% W0 ~* @% u3 M! M) M5 W& x8.    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
' n' U1 h. m) t# ?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
5 B4 L5 t8 D% ^( D- i6 z( y11.  50 MHz Ethernet PHY oscillator (Y3).  50MHZ晶振 没看文档前还以为是电容   
, `. u0 s0 E  c' }" G12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
) k* B# v9 X9 w1 p8 h13.  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：
) y1 Z0 e$ I0 Y, ^7 W1 ^3 s. A1. 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
0 V; T6 A- `' j) O4 y/ Z3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
OTG/device-based applications (J3).       OTG,micro-USB连接器
; n8 h5 `2 o' q7 M* _4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
( b) a( d% h9 L# Y基本情况就介绍到这儿，这个板子本身所带的资源及信息。
. u; z0 p1 Y' _
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三．性能及相关参数（捡主要的）
3.1 power supply
* b$ c) V$ O8 o, a•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
6 e6 V" A+ V( K3 |  V4 c' ^! L•  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。
/ D- K' n9 T6 E4 @* Acan be connected to the J1 application board connector that is provided on the bottom side of the board.
3 w) T$ X6 D5 {$ D6 ~7 a+ Q3.2 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，
) j( @- i, q( H  S7 p" r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.
# k* y' q$ y6 Y& y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
; I6 {" ~4 j  \* u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
( ^4 b+ F3 r, ?& Wkit’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
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
& [. F8 u$ [2 H7 }# C% Ostarter 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。

Haiting32451

学习了……

helendcany

哦，哦，哦，这个要记……