DEBUGADPTR1-USB Silicon Labs

8-Bit USB Debug Adapter 8-BIT USB DEBUG ADAPTER USERS GUIDE 1. Introduction The 8-bit USB Debug Adapter (UDA) provides the interface between the PCs USB port and the Silicon Labs 8-bit target devices in-system debug/programming circuitry. The 10-pin ribbon cable connects the adapter to the target board and the target devices debug interface. Figure 1. 8-Bit USB Debug Adapter Visit www.silabs.com/8bit-uda for ordering information. 2. Relevant Documentation Application notes can be found on the 8-bit MCU Application Notes web page: www.silabs.com/appnotes. AN124: Pin Sharing Techniques for the C2 InterfaceDescribes in detail the debug interface pin sharing feature for C2 devices, which enables debugging and use of the /RST and GPIO pins shared with C2CK and C2D. AN117: Using C8051Fxxx On-Chip Interface Utilities DLLThe SiUtil DLL discussed in this document uses the USB Debug Adapter to program the memory space of C2 and JTAG devices. AN134: Multiple-Device JTAG Configuration in the Silicon Labs IDEConfiguration in the IDE and using the USB Debug Adapter for devices in a JTAG chain. Rev. 0.3 1/15 Copyright 2015 by Silicon Laboratories 8-Bit USB Debug Adapter8-Bit USB Debug Adapter 3. Pinout Specification The 8-Bit USB Debug Adapter supports both Silicon Laboratories JTAG and C2 debug interfaces, and the adapter is powered from the USB connection to the PC. The UDA is also capable of providing power to the target device or other circuitry via pin 10 of the connector. Table 1 shows the pin definitions for the UDA keyed connector. The part number for the matching shrouded and keyed connector for a PCB is 2510-6002UB from 3M. The USB Debug Adapter can automatically change the communication voltage level based on the level detected on pin 7 of the connector. As a result, this pin should be pulled high with a strong pull-up (~1 k ) for noise immunity purposes and not pulled down to ground. Notes: The USB Debug Adapter requires a target system clock of 32 kHz or greater. With the default settings, the USB Debug Adapter can supply up to 100 mA to a target system. Table 1. USB Debug Adapter Debug Connector Pin Descriptions Pin Description Details 1 Not Connected 2 GND (Ground) 3 GND (Ground) 4 TCK / C2D JTAG TCK or C2 Data 5 TMS / C2CK pin share JTAG TMS or C2 Clock pin sharing 6 TDO / C2D pin share JTAG TDO or C2 Data pin sharing 7 TDI / C2CK JTAG TDI or C2 Clock signal This pin is used by the UDA to sense and set the logic voltage level. This pin should never have a pull-down to ground. 8 Not Connected 9 GND (Ground) 10 USB Power 5 V power from the UDA 1 3 5 7 9 2 4 6 8 10 Figure 2. 8-Bit USB Debug Adapter Connector 2 Rev. 0.3