MAC7200 datasheet(172/976 Pages) FREESCALE

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Debug Implementation

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

Recovery, which can be used to unsecure the device and thereby enable all debug features. The TDI input

of the SoC must be valid on the rising edge of the TCK clock, with the appropriate setup and hold

requirements. If the TDI signal is asserted based on the falling clock edge of TCK, and the maximum TCK

frequency is not exceeded, then the setup and hold requirements for TDI are guaranteed to be met.

Figure 8-4. JTAG TDI Routing

8.4.1.4

TDO Routing

The TDO signal is driven by one of many test logic sources (See Table 8-1). If no test logic source is

selected, the ARM7 will drive the TDO signal low.

Figure 8-5. JTAG TDO Routing

TDI

ipp_ind_tdi

PTI

Synch.

Logic

dbg_tdi_sync

dbg_tdi_platform

To ARM7/Nexus

1’b0

debug disabled

INTEST/Shift-DR

PTI Test Logic

ARM7 TDO

Nexus TDO

PTI TDO

SC0/1

Nexus

JTAG Test

1’b0

Selected

TDO

dbg_tdo

PTI

Nexus

ARM7

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