【PIC32 starter kit】之性能初窥

duzy

板载资源介绍
一．正面：
, j! R" }4 j* s7 Q" Z+ H- a官方原文指导：
The top assembly of the board includes these key features, as indicated in Figure 1-1:
/ ]) l+ h* O5 b) `# Z6 k8 [6 a1.    PIC32MX795F512L 32-bit microcontroller (U2).   核心的东西
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.    USB connectivity for on-board debugger communications (J7).   小口USB连接器用于DEBUG
3 A7 n8 q1 f4 L4 v/ Q) n( O! G5.    Debug indicator LED (D7).                 Debug指示灯
6 i8 n; |% V0 }7 i; g# S6.    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
8.    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
! k, C; n% `( H3 g4 [6 k' }8 ?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
11.  50 MHz Ethernet PHY oscillator (Y3).  50MHZ晶振 没看文档前还以为是电容   
+ |! }  t, ^5 u0 _! p6 W12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
3 a  _- K2 x" _2 n7 L- O- }# [  M, R13.  USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。
* e( k8 _" _# }/ _$ G二．反面：
, x0 E) a1 ]0 P: |0 b0 M# o1. 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
' A7 g, @4 P, @( R3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
3 U$ m9 y4 H( F; k0 |. P6 {OTG/device-based applications (J3).       OTG,micro-USB连接器
- i  ^# I8 {" s4 V2 v, `  C4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
3 l$ w6 q( F* M1 F# X7 |, y6 @& E基本情况就介绍到这儿，这个板子本身所带的资源及信息。
: J; ~3 M) E) A7 X1 d& {: l, C
8 ^- O) t: w$ b0 t$ v9 C=======================================================================================================
) _, R* B; y8 V) p% t三．性能及相关参数（捡主要的）
: a$ S2 H9 ]9 L3.1 power supply
' ~$ R, [' E0 x4 l•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
; w$ u+ @0 B3 m* Z•  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。
9 |+ W, G' |3 ccan be connected to the J1 application board connector that is provided on the bottom side of the board.
, c! _& A2 `9 L) b  v3.2 PIC32 USB Connectivity（USB连接）
( Y$ k" _+ _: D! \# WUSB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，
/ G9 ?. D' d% V) a$ s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
1 ?( [5 e$ e: u4 k, 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
9 K; u/ D4 V* W+ {5 o8 a" `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
+ F7 D7 `6 S4 A7 W/ tbe 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
4 \- B, y2 Z3 ~5 Y! d' r( istarter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should
* H) }% ]$ b- e. @! N7 a& Obe 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……