MOTOROLA
Chapter 12. IEEE 1149.1 Test Access Port
12-3
Part III. The Hardware Interface
Figure 12-2. TAP Controller State Machine
12.3 Boundary Scan Register
The MPC8260Õs scan chain implementation has a 475-bit boundary scan register that
contains bits for all device signal, clock pins, and associated control signals. The XTAL,
EXTAL, and XFC pins are associated with analog signals and are not included in the
boundary scan register. An IEEE-1149.1-compliant boundary-scan register has been
included on the MPC8260 that can be connected between TDI and TDO when EXTEST or
SAMPLE/PRELOAD instructions are selected. It is used for capturing signal pin data on
the input pins, forcing Þxed values on the output signal pins, and selecting the direction and
drive characteristics (a logic value or high impedance) of the bidirectional and three-state
signal pins. Figure 12-3, Figure 12-4, Figure 12-5, and Figure 12-6 show various cell types.
Test Logic
Reset
RunÑTest/Idle
SelectÑDR_SCAN
CaptureÑDR
ShiftÑDR
Exit1ÑDR
PauseÑDR
Exit2ÑDR
UpdateÑDR
SelectÑIR_SCAN
CaptureÑIR
ShiftÑIR
Exit1ÑIR
PauseÑIR
Exit2ÑIR
UpdateÑIR
0
0
0
0
1
1
1
0
0
0
0
1
1
1
1
1
0
0
1
1
1
1
Summary of Contents for MPC8260 PowerQUICC II
Page 1: ...MPC8260UM D 4 1999 Rev 0 MPC8260 PowerQUICC II UserÕs Manual ª ª ...
Page 66: ...lxvi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA ...
Page 88: ...1 18 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Page 120: ...2 32 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Page 138: ...Part II iv MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II Configuration and Reset ...
Page 184: ...4 46 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II ConÞguration and Reset ...
Page 202: ...Part III vi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 266: ...8 34 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 382: ...10 106 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 392: ...11 10 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 430: ...Part IV viii MOTOROLA Part IV Communications Processor Module ...
Page 490: ...14 36 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part IV Communications Processor Module ...
Page 524: ...17 10 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part IV Communications Processor Module ...
Page 556: ...18 32 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part IV Communications Processor Module ...
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Page 980: ...A 4 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Appendixes ...
Page 1002: ...Index 22 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA INDEX ...
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