Automotive SPI Communication Interface (ASCI)

The MAX17841B ASCI combines an SPI port with a universal asynchronous receiver transmitter (UART) specially designed to interface with Maxim battery management devices.

The UART can be configured to automatically perform Manchester encoding/decoding, message framing, parity, wake-up, and keep-alive signaling as required for Maxim’s battery management UART protocol.

The UART has programmable baud rates of 0.5Mbps, 1Mbps, or 2Mbps and supports either single-ended or differential signaling. For host efficiency, the UART contains a 28-byte transmit buffer and a 62-byte receive buffer with host-configurable interrupt events.

Applications

* Battery Management Systems (BMS) * Electric and Hybrid Vehicles (EV/HEV) * Energy Storage Systems (ESS)

* Supports Maxim’s Battery Management UART Protocol

* SPI Interface Up to 4MHz

* UART Baud Rate Programmable Up to 2Mbps

* 3.3V or 5V Operation

* Ultra-Low Quiescent Current

* Transmit and Receive Buffers with Programmable Interrupts Allow for Queuing of UART Messages

* Manchester Encoder and Decoder Reduces Host Controller Burden

* Operating Temperature Range from -40°C to +105°C (AEC-Q100 Type 2)

* Supports ASIL Requirements