NXP Semiconductors MPC5644A Reference Manual page 738

Reaction Module (REACM)
eTPU CH0
time control
v
eTPU CH1
time control
Reaction CH0
modulated current
Reaction CH1
modulated current
There are several possible configurations for a banked mode application. The objective on those
configurations is to share hardware resources such as Reaction Module channels, ADC monitor inputs and
MCU pins, among others related to the Injector driver which is not covered in detail in this document.
Figure 23-37 shows a more detailed diagram of the interconnection between the injector bank and the
Reaction Module. Two reaction channels are used in this application. CH0 is used to control Injector A
and CH1 is used to control Injector B. However, the Vboost/Vbatt selection is controlled by CH0 ch0_a
output only since when Vboost driver is switched off Vbatt power source is applied to the injectors by the
direct bias of the diode connecting Vbatt to the injector bank.
738
v
ON
i
i
Figure 23-36. eTPU CH10/1 controlling reaction CH0/1
MPC5644A Microcontroller Reference Manual, Rev. 6
OFF
time
time
time
time
Freescale Semiconductor