702560 Spectrum Digital Inc, 702560 Datasheet - Page 22
![XDS560R USB JTAG Emulator With 20 Pin CTI JTAG Header](/photos/9/27/92743/702560_sml.jpg)
702560
Manufacturer Part Number
702560
Description
XDS560R USB JTAG Emulator With 20 Pin CTI JTAG Header
Manufacturer
Spectrum Digital Inc
Type
USB JTAG Emulatorr
Specifications of 702560
Contents
Board, Cable
Ic Product Type
USB JTAG Emulator
Kit Contents
XDS560R USB JTAG Emulator With CTI JTAG Header, CDROM With Drivers, USB Cable
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
TI DSPs and JTAG Microcontrollers
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Spectrum Digital, Inc
3.2 Bus Protocol
3-4
The IEEE 1149.1 specification covers the requirements for JTAG bus slave devices
(such as the TMS320C5x family) and provides certain rules, summarized as follows:
__ The TMS/TDI inputs are sampled on the rising edge of the TCK signal of the
__ The TDO output is clocked from the falling edge of the TCK signal of the device
When JTAG devices are daisy-chained together, the TDO of one device has
approximately a half TCK cycle set up to the next device’s TDI signal. This type of
timing scheme minimizes race conditions that would occur if both TDO and TDI
were timed from the same TCK edge. The penalty for this timing scheme is a
reduced TCK frequency.
The IEEE 1149.1 specification does not provide rules for JTAG bus master
(emulator) devices.
device.
XDS560R JTAG Emulator Installation Guide