Nexus Development Interface (NDI)
Freescale Semiconductor
31-63
PXR40 Microcontroller Reference Manual, Rev. 1
31.14.10.2 JTAG Sequence for Read Access of Memory-Mapped Resources
31.14.10.3 JTAG Sequence for Write Access of Memory-Mapped Resources
31.15 Nexus Crossbar eDMA Interface (NXDM) and Nexus Crossbar
FlexRay Interface (NXFR)
The third module of the device NDI interface is the e200z7 eDMA Nexus module (NXDM) which is
compliant with the Class 3 defined data trace feature of the IEEE-ISTO 5001-2011 standard.The fourth
module of the device NDI interface is the FlexRay module (NXFR) which is compliant with the Class 3
defined data trace feature of the IEEE-ISTO 5001-2011 standard. The NXDM can be programmed to trace
data accesses for the eDMA module on the system bus. The NXFR can be programmed to trace data
accesses for the FlexRay module on the system bus. This eDMA module and FlexRay module as well as
the Nexus module are components of the e200z7 platform. All output messages and register accesses are
compliant with the protocol defined in the IEEE-ISTO 5001 standard.
Table 31-34. Accessing Memory-Mapped Resources (Reads)
Step #
TCLK clocks
Description
1
13
Nexus Command = write to read/write access address register (RWA)
2
37
Write RWA (initialize starting read address—data input on TDI)
3
13
Nexus Command = write to read/write control/status register (RWCS)
4
37
Write RWCS (initialize read access mode and CNT value—data input on TDI)
5
—
Wait for falling edge of RDY pin
6
13
Nexus Command = read the read/write access data register (RWD)
7
37
Read RWD (data output on TDO)
8
—
If CNT > 0, go back to Step #5
Table 31-35. Accessing Memory-Mapped Resources (Writes)
Step #
TCLK clocks
Description
1
13
Nexus Command = write to read/write access control/status register (RWCS)
2
37
Write RWCS (initialize write access mode and CNT value—data input on TDI)
3
13
Nexus Command = write to read/write address register (RWA)
4
37
Write RWA (initialize starting write address—data input on TDI)
5
13
Nexus Command = read the read/write access data register (RWD)
6
37
Write RWD (data output on TDO)
7
—
Wait for falling edge of RDY pin
8
—
If CNT > 0, go back to Step #5
Summary of Contents for PXR4030
Page 1: ...PXR40 Microcontroller Reference Manual Devices Supported PXR4030 PXR4040 PXR40RM Rev 1 06 2011...
Page 30: ...PXR40 Microcontroller Reference Manual Rev 1 Freescale Semiconductor xxx...
Page 40: ...PXR40 Microcontroller Reference Manual Rev 1 xl Freescale Semiconductor...
Page 66: ...Memory Map PXR40 Microcontroller Reference Manual Rev 1 2 4 Freescale Semiconductor...
Page 120: ...Signal Descriptions 3 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 860: ...FlexCAN Module 24 50 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
Page 1167: ...Decimation Filter Freescale Semiconductor 28 53 PXR40 Microcontroller Reference Manual Rev 1...
Page 1168: ...Decimation Filter 28 54 Freescale Semiconductor PXR40 Microcontroller Reference Manual Rev 1...
