702560 Spectrum Digital Inc, 702560 Datasheet - Page 23

• 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

3.3 XDS560R Emulator Cable Pod Logic
Figure 3-3 shows a portion of the XDS560R emulator cable pod. The following items
are characteristics of the XDS560R pod:
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EMU0/EMU1 is set to 1/2 of the TVD signal. For TVD voltages greater than 3.3 V, the
The TCK signal is AC termination on the return side of the TCK (TCK_RET). The
termination voltage is set to 1/2 of the TVD voltage to minimize loading effects.
10 KW resistor pulled up to the same voltage as set by TVD voltage.
trigger level is set to approximately 1.65 V.
signal, but can be generated from the falling edge of TCK_RET to be in accordance
with the IEEE 1149.1 bus slave device timing rules.
500 KHz to 50 MHz, but the operation is limited by timing of various signals and the
target devices. Note: All timing for the pod and emulator are from the TCK_RET
signal, therefore a user may provide their own test clock (TCK).
TVD signal is reduced by more than one third of its reset voltage.
ensure that the target inputs are at a set level given that the outputs from the
XDS560R pod are Hi-Z after a power failure or disconnect.
used to detect if the target pod is connected to a target board. Pin 4 on the user
target board must be connected to ground.
signal on the target board. The target board designer may use this pin 6 as an
optional Host Disconnect (HDIS) signal. This signal could be used within the target
board to detect if the JTAG emulator cable/pod header is connected.
The TDO signal from the slave device is terminated at the pod of the cable with a
The trigger level for high-to-low and low-to-high transition for TDO, TCK_RET, and
The pod provides a programmable (TCK) test clock source. The range of this TCK is
Signals TCK, TMS, TDI, and TRST have a 100 KW pull-down resistor. This is to
Pin 4 of the emulation header is the Target Disconnect (TDIS) signal. This signal is
The impedance of the emulation pod cable is 50 ohms.
Design Note: Pin 6 of the target emulation header is normally connected to a ground
Signals TMS, TDI and TRST are series terminated to reduce signal reflections.
The TCK signal output has a medium-current drive capability of 24 mA I
Signals TMS and TDI, by default, are generated on the rising-edge of the TCK_RET
All output signals from the pod are Hi-Z, whenever the pod power is turned on or
Spectrum Digital, Inc
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