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Pin Assignment
MM912F634 Pin Description
MM912F634
Freescale Semiconductor
7
19
VS1
Power Supply Pin 1
This pin is the device power supply pin 1. VS1 is primarily supplying the VDDX
Voltage regulator and the Hall Sensor Supply Regulator (HSUP). VS1 can be
sensed via a voltage divider through the AD converter. Reverse battery protection
20
VS2
Power Supply Pin 2
This pin is the device power supply pin 2. VS2 supplies the High Side Drivers (HSx).
21
HS1
High Side Output 1
This pin is the first High Side output. It is supplied through the VS2 pin. It is designed
to drive small resistive loads with optional PWM. In cyclic sense mode, this output
22
HS2
High Side Output 2
This pin is the second High Side output. It is supplied through the VS2 pin. It is
designed to drive small resistive loads with optional PWM. In cyclic sense mode, this
23
HSUP
Hall Sensor Supply Output This pin is designed as an 18 V Regulator to drive Hall Sensor Elements. It is
supplied through the VS1 pin. An external capacitor (CHSUP) is needed. See
24
LIN
LIN Bus I/O
This pin represents the single-wire bus transmitter and receiver. See
Section 4.14,25
LGND
LIN Ground Pin
This pin is the device LIN Ground connection. DGND, LGND, and AGND are
internally connected to PGND via a back to back diode.
26
PTB0
General Purpose I/O 0
This is the General Purpose I/O pin 0 based on VDDX with the following shared
functions:
PTB0 - Bidirectional 5.0 V (VDDX) digital port I/O with selectable internal pull-up
resistor.
AD0 - Analog Input Channel 0, 0…2.5 V (ADC2p5) analog input
TIM0CH0 - Timer Channel 0 Input/Output
Rx - Selectable connection to LIN / SCI
27
PTB1
General Purpose I/O 1
This is the General Purpose I/O pin 1 based on VDDX with the following shared
functions:
PTB1 - Bidirectional 5.0 V (VDDX) digital port I/O with selectable internal pull-up
resistor.
AD1 - Analog Input Channel 1, 0…2.5 V (ADC2p5) analog input
TIM0CH1 - Timer Channel 1 Input/Output
Tx - Selectable connection to LIN / SCI
28
PTB2
General Purpose I/O 2
This is the General Purpose I/O pin 2 based on VDDX with the following shared
functions:
PTB2 - Bidirectional 5.0 V (VDDX) digital port I/O with selectable internal pull-up
resistor.
AD2 - Analog Input Channel 2, 0…2.5 V (ADC2p5) analog input
TIM0CH2 - Timer Channel 2 Input/Output
PWM - Selectable connection to PWM Channel 0 or 1
29
ADC2p5
ADC Reference Voltage
This pin represents the ADC reference voltage and has to be connected to a filter
30
AGND
Analog Ground Pin
This pin is the device Analog to Digital Converter ground connection. DGND, LGND
and AGND are internally connected to PGND via a back to back diode.
Table 3. MM912F634 Pin Description (continued)
Pin #
Pin Name
Formal Name
Description