M6636B

E2E1035-27-Y2 www.DataSheet4U.com ¡ Semiconductor ¡ Semiconductor MSM6636B This version:MSM6636B Jan. 1998 Previous version: Nov. 1996 SAE-J1850 Multiplex Communication Protocol Conformity Transmission Controller for Automotive LAN GENERAL DESCRIPTION The MSM6636B is a transmission controller for automotive LAN based on data communication protocol SAE-J1850. This device can realize a data bus topology bus LAN system with a PWM bit encoding method (41.6 kbps). In addition to a protocol control circuit, MSM6636B has an enclosed quartz oscillation circuit, host CPU interface (parallel interface), a transmit/receive buffer, and a bus receiver circuit that decreases the burden on the host CPU. FEATURES Based on SAE-J1850 CLASS B DATA COMMUNICATION NETWORK INTERFACE (issued August 12, 1991) Non-destructive collision and priority control using CSMA/CD Internal transmit buffer (1 frame) and receive buffer (2 frames) Modulating/demodulating: PWM (Pulse Width Modulation) Transmission speed: 41.6 kbps Multi-address setting with physical addressing: 1 type / functional addressing: 15 types Address filter function by multi-addressing (broadcasting possible) Automatic retransmission function by arbitration loss and non ACK Three types of in-frame response support: q Single-byte response from a single node w Multi-byte response from a single node (with CRC code) e Single-byte response from multiple nodes (ID response as ACK) Error detection by cyclic redundancy che...