Nexus
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
24-47
Reading/writing of a NZ6C3 register then requires two (2) passes through the data-scan (DR) path of the
JTAG state machine (refer to 24.11.17).
1. The first pass through the DR selects the NZ6C3 register to be accessed by providing an index
), and the direction (read/write). This is achieved by loading an 8-bit value into
the JTAG data register (DR). This register has the following format:
2. The second pass through the DR then shifts the data in or out of the JTAG port, lsb first.
a) During a read access, data is latched from the selected Nexus register when the JTAG state
machine passes through the capture-DR state.
b) During a write access, data is latched into the selected Nexus register when the JTAG state
machine passes through the update-DR state.
24.11.11 Ownership Trace
This section details the ownership trace features of the NZ6C3 module.
24.11.11.1 Overview
Ownership trace provides a macroscopic view, such as task flow reconstruction, when debugging software
written in a high level (or object-oriented) language. It offers the highest level of abstraction for tracking
operating system software execution. This is especially useful when the developer is not interested in
debugging at lower levels.
24.11.11.2 Ownership Trace Messaging (OTM)
Ownership trace information is messaged via the auxiliary port using an ownership trace message (OTM).
The e200z6 processor contains a Power Architecture Book E defined process ID register within the CPU.
The process ID register is updated by the operating system software to provide task/process ID
information. The contents of this register are replicated on the pins of the processor and connected to
Nexus. The process ID register value can be accessed using the
mfspr
/
mtspr
instructions. Please refer to
the
e200z6 PowerPC
TM
Core Reference Manual
for more details on the process ID register.
There is one condition that will cause an ownership trace message: When new information is updated in
the OTR register or process ID register by the e200z6 processor, the data is latched within Nexus, and is
messaged out via the auxiliary port, allowing development tools to trace ownership flow.
Nexus Register Index:
Selected from values in
Read/Write (R/W):
0 Read
1 Write
Nexus register index
(7-bits)
(1-bit)
R/W
RESET Value: 0x00
Summary of Contents for MPC5565
Page 18: ...MPC5565 Microcontroller Reference Manual Devices Supported MPC5565 MPC5565 RM Rev 1 0 09 2007...
Page 34: ...MPC5565 Reference Manual Rev 1 0 Freescale Semiconductor 15...
Page 35: ...MPC5565 Reference Manual Rev 1 0 16 Freescale Semiconductor...
Page 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Page 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Page 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Page 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...