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CONTENTS
Paragraph
Number
Title
Page
Number
Contents
xxi
9.6.2.2.5
9.6.2.2.6
9.6.2.2.7
9.6.2.2.8
9.6.2.3
9.7
9.7.1
9.7.2
9.7.3
9.8
9.8.1
9.8.2
9.9
9.9.1
Pipelining of Data-Only Transactions.................................................. 9-54
Retrying Data-Only Transactions......................................................... 9-55
Ordering of Data-Only Transactions.................................................... 9-56
Data Tenure Reordering in MPX Bus Only ......................................... 9-57
Data Termination Phase in MPX Bus Mode ............................................ 9-57
Interrupt, Checkstop, and Reset Signal Interactions......................................... 9-58
External Interrupts ........................................................................................ 9-58
Checkstops.................................................................................................... 9-58
Reset Inputs................................................................................................... 9-58
Processor State Signal Interactions................................................................... 9-59
System Quiesce Control Signals................................................................... 9-59
Support for the
lwarx/stwcx.
Instruction Pair.............................................. 9-59
IEEE 1149.1a-1993 Compliant Interface.......................................................... 9-60
JTAG/COP Interface..................................................................................... 9-60
Chapter 10
Power and Thermal Management
10.1
10.2
10.2.1
10.2.2
10.2.3
10.2.3.1
10.2.3.2
10.2.4
10.2.4.1
10.2.4.2
10.2.4.3
10.2.4.4
10.2.4.5
10.2.4.6
10.2.5
10.3
10.3.1
10.3.2
10.3.2.1
10.3.2.2
10.3.2.3
10.3.2.4
10.4
Dynamic Power Management........................................................................... 10-1
Programmable Power Modes............................................................................ 10-1
Full-Power Mode with Dynamic Power Management Disabled.................. 10-3
Full-Power Mode with Dynamic Power Management Enabled................... 10-3
Doze Mode.................................................................................................... 10-3
Entering Doze Mode................................................................................. 10-3
Returning to Full-Power Mode from Doze Mode .................................... 10-4
Nap Mode ..................................................................................................... 10-4
Entering Nap Mode................................................................................... 10-4
Nap Mode Bus Snooping Sequence ......................................................... 10-5
Returning to Full-Power Mode................................................................. 10-5
Sleep Mode............................................................................................... 10-5
Entering Sleep Mode ................................................................................ 10-6
Returning to Full-Power Mode................................................................. 10-6
Power Management Software Considerations.............................................. 10-6
Thermal Assist Unit (TAU).............................................................................. 10-7
Thermal Assist Unit Overview..................................................................... 10-7
Thermal Assist Unit Operation..................................................................... 10-9
Thermal Assist Unit Single-Threshold Mode........................................... 10-9
Thermal Assist Unit Dual-Threshold Mode........................................... 10-10
MPC7400 Junction Temperature Determination.................................... 10-11
Power Saving Modes and Thermal Assist Unit Operation..................... 10-11
Instruction Cache Throttling........................................................................... 10-11