82-000760-01 Datasheet, PDF (35/44 Pages) Analog Devices – HPUSB USB and HPPCI Emulators

Hardware Description
Custom Processor Boards
When designing a custom processor board using Analog Devices
processors and DSPs, special care must be taken to ensure that the JTAG
interface is designed and laid out correctly. If the board is not designed
correctly, communication via the JTAG port may not work. Another side
effect may be that the interface works, but you are not able to run at the
highest possible JTAG clock frequency. The JTAG clock frequency is
dependant on the particular Analog Devices processor, as well as the delay
characteristics of the custom processor board.
To ensure that the custom board’s JTAG interface is designed and laid out
correctly, refer to Engineer-to-Engineer Note, Analog Devices JTAG Emu-
lation Technical Reference (EE-68), available from the Analog Devices Web
site. This document is a technical reference for implementing the JTAG
interface on your target.
HPPCI-ICE
The HPPCI-ICE consists of a daughter board and a pod cable. The system
is compliant with revision 2.2 of the PCI specification and plugs into
5V-only motherboards. It uses only the 5 volts from the PC’s PCI slot.
The pod cable consists of a small PCB that has a multi-conductor cable
soldered at each end. The multi-conductor cable is constructed with indi-
vidual coaxial cables that are encapsulated by shield ground. The PCB in
the pod is fully enclosed in a copper-sprayed plastic enclosure. The
multi-conductor cables and copper spray reduce system noise and electro-
magnetic interference.
HPUSB, USB, and HPPCI Emulators User’s Guide
2-5