ulink2管脚连接说明.doc

Target ConnectorsHome » Hardware Description » Target ConnectorsULINK2 provides five JTAG connectors. They support various cable types, which are used for debugging different targets. The connectors provided are:§ A narrow (2.00mm/0.079") pin spacing) 20-pin connector for ARM targets,§ A standard (2.54mm/0.1") 20-pin connector for ARM targets,§ A 16-pin connector for Infineon OCDS (JTAG) targets,§ A 14-pin connector for STMicroelectronics µPSD targets,§ and a 10-pin connector for ARM targets (Mfgr: Don Connex P/N: C42 or Samtec P/N: SHF-105-01-L-D-TH). The Samtec part is available with different options for plating, tail, shroud, and lead style.A cable for each connector is shipped with the ULINK2 Standard Product. If you must change cables, then make sure to line up the marker stripe on the cable with pin 1 of the connector. Pin 1 is labeled on the board.ULINK2 Adapter Connectors (cover off)ULINK2 supports both JTAG and Serial Wire Mode interfaces. Refer to the appropriate pinout diagram for the ULINK2 adapter connectors to make sure they match your target hardware.JTAG InterfaceSignalConnects to...TMSTest Mode State pin — Use 100K Ohm pull-up resistor to VCC.TDOTest Data Out pin.RTCKJTAG Return Test ClocK. (see Note below)TDITest Data In pin — Use 100K Ohm pull-up resistor to VCC.TRSTTest ReSeT/ pin — Use 100K Ohm pull-up resistor to VCC. TRST is optional and not available on some devices. You may leave it unconnected.TCLKTest CLocK pin — Use 100K Ohm pull-down resistor to GND.VCCPositive Supply Voltage — Power supply for JTAG interface drivers.GNDDigital ground.RESETRSTIN/ pin — Connect this pin to the (active low) reset input of the target CPU.CPUCLKCPU clock (according IEEE Standard 1149.1).OCDSEEnable/Disable OCDS interface (Infineon-specific).TRAPTrap condition (Infineon-specific).BRKINHardware break in (Infineon-specific).BRKOUTHardware break out (Infineon-specific)./JENJTAG Enable (STMicroelectronics specific).TSTATJTAG ISP Status (STMicroelectronics specific) (optional)./RSTChip reset (STMicroelectronics specific)./TERRJTAG ISP Error (STMicroelectronics specific) (optional).Serial Wire Mode Interface（串行模式接口）The Serial Wire (SW) mode is a different operating mode for the JTAG port where only two pins, TCLK and TMS, are used for the communication. A third pin can be use optionally to trace data. JTAG pins and SW pins are shared.串行模式接口的操作不同于JTAG，因为串行模式只要2个线，TCLK（9号管脚时钟，即swclk）和TMS（7号管脚SWDIO，即数据）。

第3根线(swo)是可选的，用来跟踪数据JTAG模式下管脚和串行模式（SW）的管脚是共用的，即ULINK2可以工作在JTAG模式下，或者串行模式(SW)下§ TCLK is SWCLK (Serial Wire Clock)§ TMS is SWDIO (Serial Wire debug Data Input/Output)§ TDO is SWO (Serial Wire trace Output)JTAG模式下的TCLK管脚是串行模式下的SWCLK管脚(串行时钟输出)；JTAG模式下的TMS管脚是串行模式下的SWDIO管脚（串行数据输入/输出）；JTAG模式下的TDO管脚是串行模式下的SWO管脚（串行数据跟踪输出）；SignalConnects to...SWDIOData I/O pin. Use 100K Ohm pull-up resistor to VCC.数据I/0管脚，用100K的电阻上拉到VCC上SWOOptional trace output pin.可选的跟踪输出管脚SWCLKClock pin. Use 100K Ohm pull-down resistor to GND.时钟管脚，用100K的电阻下拉到GND上。

VCCPositive Supply Voltage — Power supply for JTAG interface drivers.电压输入管脚-为JTAG接口驱动提供电能注：该电压由arm芯片提供，在unlik2里面有个蓝色的小跳线帽，电压有2个选择，一个是ARM,一个是VCC；如果选择的是ARM则有外部的被仿真的ARM提供，如果选择VCC则可以有ULINK2自己提供GNDDigital ground.数字地管脚RESETRSTIN/ pin — Connect this pin to the (active low) reset input of the target CPU.复位管脚-连接到目标CPU的reset的管脚上该CPU是低电平复位）Additional ARM 10-pin cables with connectors are available directly from Samtec:§ 6" Cable (Samtec P/N: FFSD-05-D-06.00-01-N)§ 12" Cable (Samtec P/N: FFSD-05-D-12.00-01-N) Note§ ULINK2 is powered through the USB connection.§ ULINK2 operates at 3.3V. All JTAG pins are 5V tolerant.§ Usually, devices do not include pull-up or pull-down resistors on JTAG nor SW pins. Resistors should be added externally onto the board. However, do not add resistors when the device includes them already.§ Some NXP LPC2000 Devices have special pins (RTCK, DBGSEL) that enable the JTAG interface. For example, on the NXP LPC2129 the signal RTCK must be driven low during RESET to enable the JTAG interface. You may want to add jumpers to your hardware to accomplish this.注:1. ULINK2的供电会流过USB接口；2. ULINK2的工作电压在3.3V，所有的JTAG管脚能承受的最大电压是5V；3. 一般来说，你的CPU内部是没有上拉或下拉电阻连接到JTAG或串行模式（SW）管脚的，你应该在CPU的外部增加电阻来连接他们。

如果，你的CPU内部已经有上拉或下拉电阻连接到JTAG或SW管脚上了，就不要在CPU外部在使用上拉或下拉电阻了4. 有些芯片，类似于NXP LPC2000系列，它们有一些特殊的管脚（RTCK,DBGSEL）用来打开JTAG接口像是LPC2129的RTCK管脚必须在低电平的时候，复位后才能打开JTAG接口，你或许需要增加跳线来完成这些。