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板载资源介绍5 B5 |2 A& G& c9 ^0 i' o& w& z1 }: e# p, k
一．正面：) I9 f# }: H) B# y. g9 G5 K d) h! D
官方原文指导：
) E( T5 v6 L% H9 j% `& @; zThe top assembly of the board includes these key features, as indicated in Figure 1-1:
" \7 b- N) E6 l1 K3 c i" R1. PIC32MX795F512L 32-bit microcontroller (U2). 核心的东西9 Q1 W8 f$ m* t9 N* ~% K8 w# K
2. Green power indicator LED (D4). 电源指示灯* E* o# ?6 J0 V) T
3. On-board crystal for precision microcontroller clocking (8 MHz) (Y1). 板上晶振
2 m6 ?( n% d! N1 q4. USB connectivity for on-board debugger communications (J7). 小口USB连接器用于DEBUG
6 T5 u) a6 K1 e8 F# n- ~) G+ A5. Debug indicator LED (D7). Debug指示灯. e# P5 L; w+ h
6. Three push button switches for user-defined inputs (SW1, SW2, SW3). 3个按键，用户输入: h+ f, y w+ D7 a+ F* t
7. Three user-defined indicator LEDs (D1, D2, D3). 3个用户指示灯
) `: y d) l. s8. USB Type A receptacle connectivity for PIC32 host-based applications (J4). USB连接器用于用户使用$ B: e* U" @/ p2 r
9. HOST mode power jumper (J5). 电源模式跳线$ T; B) J5 \7 ]$ n
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- I8 g! r* g1 ~
11. 50 MHz Ethernet PHY oscillator (Y3). 50MHZ晶振 没看文档前还以为是电容
" e+ o {+ B: D3 [( {12. 32 kHz oscillator (optional) (Y2). 32KHZ晶振. ?) @: p7 H/ ?# g' l
13. USB Host and OTG power supply for powering PIC32 USB applications (U4). 用户使用的USB工作芯片。9 {- o+ \5 k' x. p; }
二．反面：
2 ?# x4 w2 w. _; B) A) ?. u( i1 v1. Regulated +3.3V power supply for powering the starter kit through USB or1 C. {- T9 _/ A }2 _$ G) c
expansion board (U8). 3.3V的电源支撑. B3 U& \/ C1 c
2.Connector for various expansion boards (J1). 扩展板连接器7 R f! u% f9 j; x# _
3.USB Type micro-AB receptacle for OTG and USB device connectivity for PIC32
7 J* Z# Y6 W; g- E5 GOTG/device-based applications (J3). OTG,micro-USB连接器! Y7 m3 x; D" o) p
4.PIC24FJ256GB106 USB microcontroller for on-board debugging (U6).usb-debug芯片。
5 C2 ?) a$ K( 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。
( E4 I0 c4 D, Y3 s) s
) X; U- i$ U8 m=======================================================================================================
8 w: ^" R% X$ O" [& i; _三．性能及相关参数（捡主要的）
( I# l+ B9 B/ z0 c i9 I& ~3.1 power supply1 p! X; Z3 s& k( }* h9 ^
• USB bus power connected to USB debug connector, J7.USB_debug连接器提供, V, U* w# G9 r/ 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。" t' D5 l# L7 R+ w% e5 y c
can be connected to the J1 application board connector that is provided on the bottom side of the board.
' \0 w! V9 Z, H+ r; ?3.2 PIC32 USB Connectivity（USB连接）/ N6 P# D2 X1 L0 o5 B
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，
. a/ i! K9 W7 Q5 L' B6 h4 @3 K还有一种是OTG模式，2 H. |" U8 z. X( e6 l, f2 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, install5 v+ Z/ q) ~5 d
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.5 k$ R4 D1 ?- c! l/ X
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
: c9 S& G7 {5 e" A( v+ _5 o在面板上看到的那两个排针。! a S4 D8 o1 ]) R" c! [% }2 q0 r
•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
7 r' f$ `; ~; ?" \" h+ xkit’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. H. s% w% ~( V8 e
be removed.7 P9 h; V5 B u' X, a
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。* H! o& D' _! x: T
•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# _ o1 f+ j( r, J* b
starter kit provides an on-board power supply capable of providing 120 mA Max. This supply is controlled by the PIC32MX795F512L microcontroller. Jumper J5 should2 {/ P. q' x$ x1 b5 u& F1 b
be removed.
, Z/ ]$ N! G: e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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