MM912H634CV1AER2 Freescale Semiconductor, MM912H634CV1AER2 Datasheet - Page 60

• Manufacturer Part Number: MM912H634CV1AER2
• Description: 64KS12 LIN2xLS/HS Isense
• Manufacturer: Freescale Semiconductor
• Series: -r

Specifications of MM912H634CV1AER2

• Applications: Automotive
• Core Processor: HCS12
• Program Memory Type: FLASH (64 kB)
• Controller Series: HCS12
• Ram Size: 6K x 8
• Interface: LIN
• Number Of I /o: -
• Voltage - Supply: 5.5 V ~ 27 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4.5
The MM912_634 analog die supplies VDD (2.5 V), VDDX (5.0 V), and HSUP, based on the supply voltage applied
to the VS1 pin. VDD is cascaded of the VDDX regulator. To separate the High Side outputs from the main power
supply, the VS2 pin does only power the High Side drivers. Both supply pins have to be externally protected
against reverse battery conditions. To supply external Hall Effect Sensors, the HSUP pin will supply a switchable
regulated supply. See
A reverse battery protected input (VSENSE) is implemented to measure the Battery Voltage directly. A serial resistor (RVSENSE)
is required on this pin. See
ADC (VS1SENSE) to measure the VS1 pin voltage directly. See
To have an independent ADC verification, the internal sleep mode bandgap voltage can be routed to the ADC (BANDGAP). As
this node is independent from the ADC reference, any out of range result would indicate malfunctioning ADC or Bandgap
reference. See
To stabilize the internal ADC reference voltage for higher precision measurements, the current limited ADC2p5 pin needs to be
connected to an external filter capacitor (CADC2p5). It is not recommended to connect additional loads to this pin. See
Section 4.20, “Analog Digital Converter -
The following safety features are implemented:
Freescale Semiconductor
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LBI - Low Battery Interrupt, internally measured at VSENSE
LVI - Low Voltage Interrupt, internally measured at VS1
HVI - High Voltage Interrupt, internally measured at VS2
VROVI - Voltage Regulator Over-voltage Interrupt internally measured at VDD and VDDX
LVR - Low Voltage Reset, internally measured at VDD
LVRX - Low Voltage Reset, internally measured at VDDX
HTI - High Temperature Interrupt measured between the VDD and VDDX regulators
Over-temperature Shutdown measured between the VDD and VDDX regulators
Power Supply
Section 4.25, “Internal Bandgap Reference Voltage Sense -
Section 4.11, “Hall Sensor Supply Output -
Section 4.23, “Supply Voltage Sense -
ADC2p5
HSUP
C
C
HSUP
ADC
HS1
HS2
ADC.
Figure 17. MM912_634 Power Supply
MM912_634 Advance Information, Rev. 4.0
HSUP (18V)
HS1 & HS2
Reference
Regulator
ADC 2.5V
VROV
VDDX
VDD
INTERNAL
INTERNAL
Section 4.24, “Internal Supply Voltage Sense -
HVI
HSUP.
VSENSE. In addition, the VS1 supply can be routed to the
VDD (2.5V)
LVI
VDDX (5V)
Regulator
Regulator
BANDGAP.
bg1p25sleep
ADC
÷
LVRX
LVR
LBI
C
C
VDDX
VDD
VDDX
VDD
VS1SENSE.
Power Supply
MCU
ANALOG
60