MM912J637AM2EPR2

Freescale's MM912_637 battery sensors are fully integrated battery monitoring devices. The devices allow simultaneous measurement of battery current and voltage for precise determination of SOC (State of Charge), SOH (State of Health), and other parameters. The integrated temperature sensor combined with the close proximity to the battery allows battery temperature measurement. Multiple application-specific hardware blocks reduce MCU overhead and related power consumption. Configurable low-power modes with automated battery state observation and sophisticated wake-up capability further reduce current consumption. The integrated LIN 2.1 interface allows communication and control of battery monitoring functions.

CPU Core

• S12 microcontroller with 128kByte(J) or 96kByte(I) Flash
• 4 kByte Data Flash
• 6 kBytes of RAM
• Background debug (BDM)

Standard I/O

• 8 x MCU General Purpose I/O including SPI functionality
• 4 x 5V GPIO including one Wake Up capable High Voltage Input (PTB3/L0)
• 16-Bit, 4 Channel - Timer Module (TIM16B4C)
• 8-Bit, 2 Channel - Pulse width modulation module (PWM)

Application Specific Functions

• Battery Voltage Measurement
• Battery Current Measurement in up to 8 ranges
• Accurate internal oscillator (for extended accuracy an external quartz oscillator may be used)
• Normal and 2 low-power modes
• Communication via LIN 2.1, LIN2.0 bus interface
• Triggered wake-up from LIN and periodic wake-up
• Signal Low Pass Filtering (Current, Voltage)
• PGA (programmable low-noise gain amplifier) with automatic gain control feature
• Current thre