Description

The M9225B is a microcontroller peripheral LSI designed for high-speed LANs in automobiles. It conforms to the CAN protocol specification for communication and offers a maximum bit rate of 1 Mbps. It features a bi-directional, two-wire serial communication method using the NRZ system with a bit stuff function. The M9225B supports a multi-master system, broadcast system, and up to 16 message boxes for transmitting or receiving messages up to 8 bytes long. It also provides priority control by identifier and supports both parallel and serial interfaces.

Specifications and features

• Conforms to CAN protocol specification (Bosch, V2.0 part B/Active)
• Maximum of 1 Mbps bit rate
• Bi-directional, two-wire serial communication using NRZ system
• Supports a multi-master system and broadcast system
• Up to 16 message boxes for transmitting or receiving messages
• Priority control by identifier
• Supports both parallel and serial interfaces
• Three interrupt sources: Transmission/receive/error
• Error control functions: Bit error/stuff error/CRC error/form error/acknowledgment error detection
• Sleep/Stop mode function
• Supply voltage: 5 V±10%
• Operating temperature: –40 to +125°C
• Package: 44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name: MSM9225BGA-2K)

Application Scenarios

The M9225B is specifically designed for use in high-speed LANs in automobiles. It can be used in various automotive communication systems that require reliable and efficient data transmission, such as diagnostics, control systems, and entertainment systems.

Comparison

The M9225B offers high-speed communication capabilities with a maximum bit rate of 1 Mbps. It supports multiple message boxes, allowing for efficient data transmission and management. The microcontroller interface supports both parallel and serial interfaces, providing flexibility in system design. The M9225B also features error control functions and sleep/stop modes, ensuring reliable and power-efficient operation.

One potential disadvantage of the M9225B is its limited package options, with only a 44-pin plastic QFP available. This may restrict its use in certain system designs that require different package types or sizes.