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Reaction Module
Boost
ctrl
Inj B top
Inj A top
Inj B bot
Inj A bot
Feedback
to the on-chip ADC
Figure 23-35. Boosted Banked Direct Injection with Passive Recirculation
Two eTPU channels are used to provide timing control signals, one for CH0 and one for CH1. The on-chip
ADC monitors the sensor current periodically and send the digitalized results to the Reaction Module. In
a banked configuration as shown in this example one ADC channel is used to monitor both injectors
current. Note that only one channel is active at a given time since the eTPU time windows are not active
at the same time for both reaction channels. Please see
Freescale Semiconductor
Injector A
MPC5644A Microcontroller Reference Manual, Rev. 6
Injector B
Current Monitor
Resistor
Figure 23-36
for more details.
Reaction Module (REACM)
Vboost
Vbatt
737
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