MSM6636B Schematic ( PDF Datasheet ) - OKI electronic componets

Teilenummer	MSM6636B
Beschreibung	SAE-J1850 Multiplex Communication Protocol Conformity Transmission Controller for Automotive LAN
Hersteller	OKI electronic componets
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Gesamt 13 Seiten E2E1035-27-Y2 ¡ Semiconductor¡ Semiconductor This version:MJSanM. 61699386B Previous version: Nov. 1996 MSM6636B 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 check (CRC) • Various communication error detections • Dual-wire bus abnormality detection by internal bus receiver and fault tolerance function • Host CPU interface is accessed in parallel • Sleep function Low current consumption mode by oscillation stop (IDS Max < 50µA) SLEEP / WAKE UP control from host CPU, WAKE UP via LAN bus • Package: 24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM6636BGS-K) 1/13 ¡ Semiconductor MSM6636B AC Chacteristics • PWM bit timing Parameter Bit Length "1" Dominant Width "0" Dominant Width "SOF" Dominant Width "SOF, BRK" Length "BRK" Dominant Width "EOD" + Bit Length "EOF" + Bit Length "EOF + IFS" " + Bit Length "0" Passive Width Symbol TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 DVDD=AVDD=5V±10%, Ta=–40 to +85°C, In setting 41.6 kbps Transmit min typ max Receive min max Unit 23.64 24.00 24.36 21.00 28.00 ms 6.90 7.00 7.11 5.00 12.00 ms 14.87 15.00 15.23 13.00 20.00 ms 30.54 31.00 31.47 29.00 36.00 ms 47.28 48.00 48.72 45.00 52.00 ms 38.42 39.00 39.59 37.00 44.00 ms 47.28 48.00 48.72 43.00 51.00 ms 70.92 72.00 — 69.00 76.00 ms 94.56 96.00 — 86.00 — ms 8.86 9.00 9.14 4.00 15.00 ms Note: The sending timing in the above table does not include the delay of the bus drivers. Dominant "1" Passive TP2 Dominant "0 " Passive Dominant " SOF " Passive Dominant " EOD " Passive Dominant " EOF " " IFS " Passive Dominant " BRK " Passive TP3 TP1 TP10 TP4 TP5 LAST BIT TP7 EOD LAST BIT EOF TP8 TP9 TP6 TP5 IFS 6/13 6 Page ¡ Semiconductor MSM6636B APPLICATION CIRCUIT Host CPU and J1850 Line Bus Connection Example Host CPU AD0-7 ALE RD WR PXX INT CLKOUT RES MSM6636B AD0-7 ALE RD WR CS INT DVDD AVDD BO (+) BI (+) C *1 BI (–) OSC0 BO (–) OPEN OSC1 RES DGND AGND RB RR RR RB Unit A RS ZD ZD RS Unit B RP . RD . . Bus + Bus – An optimum system can be constructed by selecting an optimum host CPU and combining it with the MSM6636B. *1 Insert a capacitor between the power supply and GND to prevent supply noise. It is recommended to connect a small-capacitance bypass capacitor and a large-capacitance filter capacitor serially. The typical capacitors are as follows: 0.01 to 0.22 mF : Ceramic capacitor 10 to 100 mF : Tantalum capacitor 12/13 12 Page
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Teilenummer	Beschreibung	Hersteller
MSM6636	SAE-J1850 Communication Protocol Conformity Transmission Controller for Automotive LAN	OKI electronic componets
MSM6636B	SAE-J1850 Multiplex Communication Protocol Conformity Transmission Controller for Automotive LAN	OKI electronic componets

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