MPC5746R Hardware Design Guide, Rev. 1
Emulation device
NXP Semiconductors32
8 Emulation device
The emulation device (ED) is a multi-die MCU that adds additional functionality for calibration and debug
during the ECU development. The ED consists of the production die (PD) and a buddy die (BD). The BD
JTAG interface replaces the JTAG interface of the PD, but allows access to the PD JTAG interface by
passing control from the BD JTAG interface to the PD JTAG interface. Please refer the MPC5746R
Reference Manual and AN5181:“Introduction to the MPC5746R Trace Adapter” application note for more
information.
It is recommended that customers use the NXP Trace Adapter (TA) for development systems. The TA
allows development features with a production ECU board layout. TA solutions are described in Section
8.2. and available at www.NXP.com.
Figure 19 illustrates the LFDBGK46RT4S2A adapter card for MPC5746R 292-pin BGA ED with Aurora
interface.
Figure 19. 292 BGA to 252 PGA Adapter card for Emulation and Debug Device
8.1 Emulation device power sequencing
The power supplies to the ED can be sequenced in any of the following orders.
• Power the BD first with 12 V external supply
• Power the PD second
• Or power both BD and PD at same time
8.2 Available ED Trace Adapters
There are two Trace adapters available 1) 292 BGA to 252 PGA and 2) 292 BGA to 208 PGA. The 208
PGA is used to support both 176 LQFP device and the 144 LQFP device. Another adapter is required to
adopt the 208 PGA to either the 176 LQFP footprint or the 144 LQFP footprint. Refer to Table 17 for
adapter card part numbers.
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