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板载资源介绍0 K4 Q, d! k, q# m' j+ h& C# M1 k
一.正面:
' {% ^+ x0 P, ^5 o! w7 s官方原文指导:
* r9 J) a7 M3 O+ x( EThe top assembly of the board includes these key features, as indicated in Figure 1-1:' w- |1 V' V( X! r
1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西
+ ]6 a* c' [: V, }5 |$ `2. Green power indicator LED (D4). 电源指示灯
5 m# R9 e" @* W3 b* E! \; v3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振9 R1 V$ `, N% ^8 `/ L( |
4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG
6 B- U8 h$ M2 {/ b+ O# _5. Debug indicator LED (D7). Debug指示灯+ F2 n# I% e! y% Q
6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键,用户输入/ L1 ~0 b2 \ g
7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯" O' t2 N. n3 B8 f0 g
8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用
( X- @8 o/ f2 ^9 C. x9. HOST mode power jumper (J5). 电源模式跳线
8 ^1 }& t2 Q+ E' N1 Z- Y3 F1 Z8 l& f10. LAN8740A PHY Daughter Board headers (J2) 这个拿到板的人一看就明白,网络连接接口2 I) L$ m+ [9 b; L/ U0 a2 s
11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容 " C5 R; M: h3 ?6 y' G1 N
12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振
/ X5 D( L5 c: G9 O! X% E$ G13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。) \8 Y) A/ K3 ~/ a" y* b
二.反面:3 x, X; V5 a! s) y
1. Regulated +3.3V power supply for powering the starter kit through USB or
5 b% ^3 ^ P+ r' ]' p8 _ f1 J/ Pexpansion board (U8). 3.3V的电源支撑
$ r5 v' D" B% P# _. a& y2.Connector for various expansion boards (J1). 扩展板连接器
; |, u: Z% {* C& a1 r3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32/ k4 e4 B. I2 I7 `. o
OTG/device-based applications (J3). OTG,micro-USB连接器9 o3 D- ]8 b% t
4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
' }, O d `* m8 h C$ O0 W基本情况就介绍到这儿,这个板子本身所带的资源及信息。
' ?2 J% }/ m1 `4 N, ?6 `5 K- o0 E 9 l, n% P) ^2 ~0 u
=======================================================================================================! F, K" H4 F; y; [( ~
三.性能及相关参数(捡主要的)& F( ?( y) T& Z# Q: [% r" ?
3.1 power supply
% R$ E, `1 {/ g# p8 Z• USB bus power connected to USB debug connector, J7.USB_debug连接器提供+ W: Z" w& o4 l2 F
• 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。/ T$ X* O9 [ A, c( g& q
can be connected to the J1 application board connector that is provided on the bottom side of the board.
1 o* O6 t. | L! ?3.2 PIC32 USB Connectivity(USB连接)
- T. x5 ?# o% t9 ^( X2 E3 cUSB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,* B X8 N( k5 y* a
还有一种是OTG模式, ?( a( t# S' _* @: }2 A, {
•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
) Q" m5 M `8 z" Z' M" Wjumper 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.7 {& h# L1 n: r: v2 p7 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& e+ _7 k/ Z( x: R( e
在面板上看到的那两个排针。; K n; f. F& R2 Q: z9 E
•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/ g) m* b, v# G) D& ~$ P
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 should5 i8 ?; W- r( }- J( I1 F( [
be removed.# N6 { R; p8 x( P5 x
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。
4 [. z6 v1 X, S* S. @7 [( d•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/ V" Y# V G& m
starter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should5 v: g5 ]; g; V4 s
be removed.
8 d! ]' {) F4 E' O/ A& d5 B只需要连接J3,但J5跳线要断开。 |
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