Datasheet
IBM PowerPC 750GX RISC Microprocessor
DD1.X
5.6 Output Buffer DC Impedance .......................................................................................................... 55
5.6.1 Input/Output Usage ................................................................................................................ 56
5.7 Thermal Management Information .................................................................................................. 61
5.7.1 Thermal Assist Unit ................................................................................................................ 63
5.7.2 Minimum Heat Sink Requirements ........................................................................................ 63
5.7.3 Internal Package Conduction Resistance .............................................................................. 64
5.7.4 Adhesives and Thermal Interface Materials ........................................................................... 65
5.8 Heat-Sink Selection Example .......................................................................................................... 67
5.9 Operational and Design Considerations .......................................................................................... 69
5.9.1 Level Protection ..................................................................................................................... 69
5.9.2 64-Bit or 32-Bit Data Bus Mode ............................................................................................. 69
5.9.3 I/O Voltage Mode Selection ................................................................................................... 70
5.9.4 QACK Signal Implementation for Selected Features ............................................................. 70
5.9.4.1 Precharge Duration Selection and Application ............................................................... 70
5.9.4.2 Processor Debug System Enablement when Implementing Precharge Selection ......... 71
Revision Log ................................................................................................................. 73
750GX_dsTOC.fm SA14-2765-02
September 2, 2005
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