To meet the demand for more powerful dashboard and car body electronics, Micronas has expanded its CDC 32xxG family of ARM-based 32 bit MCUs with the addition of the 3217G and 3257G MCUs.
Both chips feature the Device Lock Module, which prevents unauthorized Flash access. Like all members of the family, the new chips integrate the 32-bit ARM7TDMI RISC processor core and come with 1 MB of Flash and 32 KB of RAM on chip, plus four CAN Bus controllers.
The CDC 3257G extends 32-bit power to lower-cost applications, with 256 KBof Flash, 12 KB of RAM, and two CAN Bus controllers. Both chips include a wide range of other peripherals, including multifunction ports, a special function ROM and a sound generator. Additionally, there are two UARTs, two SPI, two IC and up to 102 pins of general purpose I/O.
According to Peter Zimmermann, Sales & Market Manager Automotive at Micronas, the CAN Bus controllers in each MCU support all 32 message objects with 512 bytes of dedicated RAM each, and are compliant to the Bosch V2.0B specifications.
He said the inclusion of four CAN Bus interfaces on-chip allow allow the dashboard controller to work as a gateway controller. “Gateways typically process data to and from the engine controller, the radio/multimedia unit and the ABS module,” he said.
Both devices feature a dedicated module to display information on an LCDpanel up to 192 segments (48 x 4) without any additional hardware. The chips operate from a single 5V power supply and can work down to 3.5V, fulfilling the special requirements of automotive manufacturers. They are specified for a temperature range between -40 and +105 C.
The entire Micronas family of automotive microcontrollers featuresLEAP technology – the Low Emissions Automotive Processor — designed to reduce electro-magnetic interference (EMI).
The devices are offered in a 128-pin PQFP and are sampling now. The CDC 3257G is ramping to production now. The CDC 3217G will ramp up later this year. Like all members of the CDC 32xxG family, both devices are fully supported by a wide range of development boards and software tools from Micronas and from third parties.
Micronas Semiconductor Holding AG