HP E2456A Motorola 68306 Preprocessor Interface

Product Summary

The Hewlett-Packard E2456A preprocessor interface provides an easy way to connect a Hewlett-Packard logic analyzer to a target system using the Motorola 68306 microprocessor. All necessary clocks are passed through by the preprocessor to the logic analyzer, ensuring that data is captured at the correct time. Software is shipped with the product that automatically configures the logic analyzer, generating labels for address, data, and status signals. Included with the software is a disassembler that displays execution traces in 68306 microprocessor mnemonics. Instructions that are pre-fetched, but not executed, are marked in the trace display.

Product Features

• Timing analysis support: provides unbuffered timing analysis for all signals
• Parametric measurements: provides probing points to take parametric measurements

Product Specifications

Microprocessor Compatibility
16.67 MHz 132-pin PQFP Motorola 68306

Logic Analyzers Supported
HP 1650B, 1652B, 1654B
HP 1660A, 1661A, 1662A
HP 16510B, 16511B
HP 16540, 16541A/D, 16542A
HP 16550A, 16555A

Pods Required

Each preprocessor has three connectors available for state analysis 
and six for timing analysis.  For disassembly, three logic analyzer 
pods must be used.  All signals used in disassembly can be double 
probed for state and timing analysis.  Seven pods would allow timing 
measurements of all processor signals.

Adapters

The 132-pin PGA-PQFP (HP E3417A) adapter is required for the 
132-pin PQFP version of the 68306

Signal Line Loading
10 pF on EXTAL and XTAL
20 pF in parallel with 100 kohms on all other signals

Product Ordering Information

HP E2456A	Motorola 68306 Preprocessor Interface

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