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板载资源介绍
& L( w. P! {' J% x' q一．正面：; c# _. s, Z9 Z3 Y: q
官方原文指导：
* [% B, T& ?& `- I+ y1 _" Q- J1 pThe top assembly of the board includes these key features, as indicated in Figure 1-1:
. X" ^+ v$ e1 E( A/ o1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西+ l8 Y4 E: Q0 J/ {4 V
2. Green power indicator LED (D4). 电源指示灯8 i6 I1 L9 ]9 [
3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
) j6 ^1 w. [( S( {+ D4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG) u3 [3 H4 Q# U" X& x! o3 L t
5. Debug indicator LED (D7). Debug指示灯
5 f9 ]" d0 T1 d% |5 @# T6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入
% @4 f6 u9 P1 p/ E7 @1 T7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯2 }; {' `. ~+ o, e7 x
8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用+ }0 m5 @# Q- \3 q8 Y* b# ~
9. HOST mode power jumper (J5). 电源模式跳线
( h& s3 X* N) m8 s# v/ 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
" l& w- E* ^2 A3 B- V" t; S11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容 0 R" K* L9 Z4 N$ n9 D
12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振
( Y# H8 J: I3 |2 P5 l+ V13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。; H* @6 C7 n, s/ k5 C
二．反面：, T( E& v/ j( X5 e6 I5 i/ i( F% P
1. Regulated +3.3V power supply for powering the starter kit through USB or; X$ K f( O! ?# e* f
expansion board (U8). 3.3V的电源支撑
- F8 z( I( n( T3 w: _/ S2.Connector for various expansion boards (J1). 扩展板连接器7 U! m& L) H& U, g4 Q; a2 R, v
3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
( q/ {( [0 a% e- ?OTG/device-based applications (J3). OTG,micro-USB连接器
% v' o" C1 k# i6 c0 K4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
7 i" K) v2 ?( Q' k* N5 P基本情况就介绍到这儿，这个板子本身所带的资源及信息。; F5 L) I, E2 Q7 x2 a
3 s9 s1 f( j' U; B$ V( r1 {
=======================================================================================================# V1 c3 r% t( U9 H! A: |% j9 h: S# w
三．性能及相关参数（捡主要的）
$ I$ }4 {8 d# k* I7 I3.1 power supply
8 I9 C3 G; I0 J& `; q9 \: ]3 f• USB bus power connected to USB debug connector, J7.USB_debug连接器提供) I3 P7 M }' P- j! h
• 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。
$ A& |2 ^3 O9 rcan be connected to the J1 application board connector that is provided on the bottom side of the board.3 F$ _* _ l! E
3.2 PIC32 USB Connectivity（USB连接）0 ]* Y* G2 I; a. H& D
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，
7 m0 u6 W* p& D# @4 d" m还有一种是OTG模式，
4 n$ }; t/ r& }+ t+ M* M# T' z•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" M) r4 A& T5 v- Q4 J
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.: B0 M4 L3 K# u; |' X4 O* j
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 o/ v B$ s8 Y4 w, R% D9 T
在面板上看到的那两个排针。! o* z! ^2 J N& E* J9 @
•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 starter8 T6 Q2 X" s; R2 d
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 P6 s" a. @7 G( n! a. Nbe removed.
& c' H" A9 g( W- sDEBUG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。/ d9 P) z1 Q/ } i. f6 L) j
•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
" l/ H4 H* z2 Vstarter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should
T+ r( ?9 a+ L' L# _/ e8 _be removed.- e. D7 j' m7 g: u% a. p( \
只需要连接J3,但J5跳线要断开。 |
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发表于 2016-4-7 11:42
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