Mitsubishi Denki Kabushiki Kaisha

Yasunori Shingaki

Nobusuke Abe

A CAN controller is equipped with a control circuit that can control whether or not an edge detection signal of a serial signal (CRX input) that is detected by an edge detection circuit is to be input to a re-synchronization circuit causing the execution of a re-synchronizing function prepared in accordance with a CAN protocol. The re-synchronizing function can be made ineffective by inputting into a control signal the control circuit. As a result, the state of synchronization of the CRX input that occurs due to the re-synchronizing function ceases to fluctuate. Therefore, in the CAN controller, a test can be performed with a high speed and stably and without being influenced by the execution of the re-synchronizing function.

Can controller and one-chip computer having a built-in can controller

A semiconductor integrated circuit device incorporates logical arithmetic circuits (11) in order to set the internal circuits (7, 10) to a stable state. Each logical arithmetic circuit (11) is placed between each of input terminals (5, 9) that are not used during a boot operation mode, and each of internal circuits (7, 10).

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Tokyo, Japan

Yasunori Shingaki