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Designing a Target System
This chapter will help you design a target system that will work with
the HP processor probe.
Target System Requirements for PowerPC 603
Only the mask revision dd3 of the PowerPC 603 chip can be used with the
HP processor probe.
Target systems which use any of the following modes of operation are not
currently supported:
•
MMU when it is used for address translation. Only physical memory
addresses are accessible.
•
Little-endian byte ordering; memory display/modify is always in big-endian
mode. Byte swapping may be handled by the host software.
•
Address parity is not generated on external address bus operations.
Accesses to devices that check parity will fail.
If the target development board does not use the QACK signal (PowerPC 603
pin #235), the board must have a pull down resistor to drive this signal low.
This allows the PowerPC to enter the debug state. Recommended value: 1K
Ω
or less.
If the target system uses reduced pinout mode, QACK must be high during
HRESET, but must be low to enter debug mode. If neither QACK nor QREQ
are being used, these two pins can be tied together and pulled high with a
1 K
Ω
pullup. If QACK or QREQ is used by the target, logic must be supplied
to make QACK low after QREQ is asserted so that the PowerPC can go into
debug mode.
TDO, TDI, TCK, TMS and TRST signal traces between the JTAG connector
and the PPC603 must be less than 3 inches long. If these signals are
connected to other nodes, the other nodes must be daisy chained between
Designing a Target System
Target System Requirements for PowerPC 603
58
Summary of Contents for E3494A
Page 3: ...iii ...
Page 4: ...iv ...
Page 8: ...Contents viii ...
Page 9: ...Part 1 Installation Installation 1 ...
Page 10: ...Installation 2 ...
Page 11: ...1 Connecting to the Host Computer Connecting to the Host Computer 3 ...
Page 34: ...Connecting to the Host Computer To verify serial communications 26 ...
Page 35: ...2 Connecting to the Target System Connecting to the Target System 27 ...
Page 39: ...Part 2 Using the HP processor probe Using the HP processor probe 31 ...
Page 40: ...Using the HP processor probe 32 ...
Page 63: ...Part 3 Reference Reference 55 ...
Page 64: ...Reference 56 ...
Page 65: ...4 Designing a Target System Designing a Target System 57 ...
Page 72: ...Designing a Target System PowerPC 603 JTAG Interface Connections and Resistors 64 ...
Page 73: ...5 Specifications and Characteristics Specifications and Characteristics 65 ...
Page 77: ...6 Updating Firmware Updating Firmware 69 ...
Page 83: ...7 Solving Problems Solving Problems 75 ...
Page 102: ...Solving Problems To obtain replacement cables 94 ...