【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
1 p7 K- x' r# ]2.    Green power indicator LED (D4).    电源指示灯
/ X4 M$ E+ k& \( X$ ], N) G3.    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
% H  f( z' m+ P& T6 j5.    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
7.    Three user-defined indicator LEDs (D1, D2, D3).   3个用户指示灯
2 c/ o7 q/ o% j) O+ v0 S, C5 Q8.    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
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   
12.  32 kHz oscillator (optional) (Y2). 32KHZ晶振
) D/ f1 y& q- P( Y, \13.  USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。
+ w+ v0 |( Q. M2 E- D$ u二．反面：
) L' l% Z7 n0 B/ n1 V4 a) `1. Regulated +3.3V power supply for powering the starter kit through USB or
expansion board (U8).   3.3V的电源支撑
) b' G/ |9 X' q  R2 l) o+ R' j: R$ V% r# {2.Connector for various expansion boards (J1).  扩展板连接器
6 f  Z, i6 D- Z7 h3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
OTG/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。
# m5 D" l6 W8 R+ ^) Z& m! Q
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; |7 Q. f4 z- e1 K; ^) t' h三．性能及相关参数（捡主要的）
: N' G7 l) V7 M0 w' O' k9 Q) R  k3.1 power supply
•  USB bus power connected to USB debug connector, J7.USB_debug连接器提供
•  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）
4 J( `- z. s( _8 pUSB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，
) c) M2 }% U! q$ B" L  [% D$ r还有一种是OTG模式，
' {6 O2 b1 x. M  o- r- D6 E: F8 ~•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
2 a* D2 x. r0 e1 ijumper 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.
5 S/ r# X0 r1 t# {! D0 K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
) s0 g. s( h# w5 _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
0 Q. H# L% y$ T6 L$ r: k! _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
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.
0 ]. M  U+ x) {! h6 N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……