The MM9Z1_638 is a fully integrated battery monitoring device. The device supports precise current measurement via an external shunt resistor. It features four voltage measurement via an internal calibrated resistor divider or use of an external divider. It includes an internal temperature sensor, allowing close proximity battery temperature measurements, plus four external temperature sensor inputs. The MM9Z1_638 includes LIN 2.2 protocol and physical interface, and an MSCAN protocol controller, for interfacing to automotive buses.Wide range battery current measurement; on-chip temperature measurementFour battery voltage measurements with internal resistor dividers, and up to five direct voltage measurements for use with an external resistor dividerMeasurement synchronization between voltage channels and current channelsFive external temperature sensor inputs with internal supply for external sensorsLow-power modes with low-current operationMultiple wake-up sources: LIN, timer, high-voltage input, external CAN interface, and current threshold and integrationPrecision internal oscillator and connections for external crystalLIN 2.2/ 2.1/ 2.0 protocol and physical interfacemsCAN protocol controller, and supply capability for 8 and 14-pin CAN interfacesS12Z MCU with 128 KB Flash, 8.0 KB RAM, 4.0 KB EEPROM