Raspberry Pi硬件

1.目前树莓派的型号（根据处理器分）

• 第一代
  • Model A
  • Model B
  • Model A+
  • Model B+
  • ZERO
• 第二代
  • Model B
• 第三代
  • Model B

还有一个Raspberry Pi Compute Module

第二代是不是叫Raspberry Pi 2B啊

图片

Raspberry Pi 1 Model A+

Raspberry Pi 1 Model B v1.0 正面

Raspberry Pi 1 Model B v1.0 背面

Raspberry Pi 1 Model B v2.0 正面

Raspberry Pi 1 Model B 国产版本 正面

Raspberry Pi 1 Model B+

Raspberry Pi 2 Model B

Raspberry Pi 3 Model B

Raspberry Pi ZERO

Raspberry Pi Compute Module

2.树莓派不同型号的具体差异

祖传的100M有线网卡, 简直残念

3.PCB引脚介绍

Raspberry Pi 1 Model B v2.0 正面

• P1: 26-pin (2x13) 2.54 mm header expansion, providing: see Low-level peripherals
  • 8 GPIOs at 3.3 V
  • 2-pin UART serial console, 3.3 V TTL (debug); or 2 GPIOs at 3.3 V
  • I²C interface (3.3 V); or 2 GPIOs at 3.3 V
  • SPI interface (3.3 V); or 5 GPIOs at 3.3 V
  • 3.3 V, 5 V and GND supply pins
  • ARM JTAG (if pins are reconfigured in software - on Revision1.0 boards one signal would also need to be taken from S5)
  • I²S interface (if pins are reconfigured in software, hardware hack may be required5)
• P2: 8-pin 2.54 mm header expansion (header not fitted on Revision 2.0 boards), providing GPU JTAG (ARM11 pinout, pin 7 is nofit for locating)
• P3: 7-pin 2.54 mm header expansion (header not fitted), providing LAN9512 JTAG (pin 6 is nofit for locating)
• P4: 10/100 Mbit/s RJ45 Ethernet jack (Model B)
• P5: 8-pin (2x4) 2.54 mm header expansion (header not fitted), on the bottom of the board, providing: see Low-level peripherals (Model B Revision 2.0 and Model A boards only)
  • 4 GPIOs at 3.3 V
  • 3.3 V, 5 V and GND supply pins
  • Second I²C interface (3.3 V) (if pins are reconfigured in software)
  • I²S interface (if pins are reconfigured in software)
  • Handshake signals for the UART on the P1 header (if pins are reconfigured in software)
• P6: 2-pin 2.54 mm header expansion (header not fitted), providing an option to connect a hardware-reset button (Revision 2.0 boards only)
• TP1 and TP2: Test Points giving access to +5 V and GND respectively
• 5 Status LEDs:
  • D5(Green) - SDCard Access (via GPIO16) - labelled as "OK" on Model B Rev1.0 boards and "ACT" on Model B Rev2.0 and Model A boards
  • D6(Red) - 3.3 V Power - labelled as "PWR" on all boards
  • D7(Green) - Full Duplex (LAN) (Model B) - labelled as "FDX" on all boards
  • D8(Green) - Link/Activity (LAN) (Model B) - labelled as "LNK" on all boards
  • D9(Yellow) - 10/100 Mbit/s (LAN) (Model B) - labelled (incorrectly) as "10M" on Model B Rev1.0 boards and "100" on Model B Rev2.0 and Model A boards

1.不过对于后面的板子, 比如1B+, 2B, 3B都是将网络指示灯集成到了RJ45插座上面了
2.电源指示灯闪烁说明你的电源有问题
3.绿色的指示灯类似于普通电脑的硬盘指示灯,表明正在读写文件
4.1B的板子有一些孔没有焊接上排针, 如果焊上排针, 将可以扩展一些额外的GPIO以及外设

Pi 1Model A and B (Original)

P1 Header

P1 Header

可以通过观察PCB丝印确定引脚顺序

P1 Header

P2 header

P2 header

GPU的JTAG接口

• Pin 1 - 3.3V (same as P1-01, 50 mA max current draw across both of them)
• Pin 7 - GND
• Pin 8 - GND

P3 header

P3 header

LAN9512 JTAG

• Pin 7 - GND

P5 header

P5 header

wiki上说从下往上看

P6 header

P6 header

短接可以重启树莓派, 1B v2.0才开始添加此设计

Model A+, B+ and B2

Raspberry Pi 1 Model B+

P1 Header

整理自: http://elinux.org/RPi_Low-level_peripherals