M6636B Oki Semiconductor, M6636B Datasheet

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M6636B

Manufacturer Part Number
M6636B
Description
Manufacturer
Oki Semiconductor
Datasheet

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E2E1035-27-Y2
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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
• 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:
• 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
• Package:
August 12, 1991)
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)
Low current consumption mode by oscillation stop (IDS Max < 50 A)
SLEEP / WAKE UP control from host CPU, WAKE UP via LAN bus
24-pin plastic SOP (SOP24-P-430-1.27-K) (Product name : MSM6636BGS-K)
Previous version: Nov. 1996
This version: Jan. 1998
MSM6636B
1/13

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M6636B Summary of contents

Page 1

... 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 ...

Page 2

... Status Register Transmission Register Response Register x'tal Clock Generator LAN Controller S-P PWM Receive Converter Decoder Buffer CRC Checker Receive Controller Transmission Controller CRC Generator P-S Converter MSM6636B MSM6636B LAN Bus Input Degital Bus Filter Receiver Address Filter LAN Bus Output PWM Encoder 2/13 ...

Page 3

... LAN—BUS input – I LAN—BUS input + O LAN—BUS output + — Analog ground pin — Digital ground pin O Crystal (or ceramic resonator) oscillation output I Crystal (or ceramic resonator) oscillaiton input I Chip select input pin I/O Address input/data input-output pin — Digital power supply voltage MSM6636B DD 3/13 ...

Page 4

... SOP package> 1000 780 500 –40 25 Ambient temperature Ta (°C) Symbol Condition — = = Ta=25°C 1 D(SOP) T — STG 125 150 MSM6636B DGND=AGND=0V Rating Unit V –0.3 to +7.0 –0 +0 –0 +0 780 –55 to +150 °C 4/13 ...

Page 5

... D OH2 =+4.0mA D OL2 O V — — OFF I During sleep — DS f=16MHz, I — load =5V, f=16 MHz, Ta=25 C MSM6636B DGND=AGND=0V Range 4 –40 to +85 =5V±10%, DGND=AGND=0V, Ta=–40 to +85°C Min. Typ. Max. ¥ 0.8 DV — DGND–0.3 — DV ¥ 0.2 DD ¥ 0.7 DV — ...

Page 6

... TP1 23.64 24.00 TP2 6.90 7.00 TP3 14.87 15.00 TP4 30.54 31.00 TP5 47.28 48.00 TP6 38.42 39.00 TP7 47.28 48.00 TP8 70.92 72.00 TP9 94.56 96.00 TP10 8.86 9.00 TP3 TP1 TP10 TP4 TP5 LAST BIT EOD TP7 LAST BIT EOF TP8 TP9 TP6 TP5 MSM6636B Receive Unit max min max ms 24.36 21.00 28.00 ms 7.11 5.00 12.00 ms 15.23 13.00 20.00 31.47 29.00 36.00 ms 48.72 45.00 52. 39.59 37.00 44.00 ms 48.72 43.00 51.00 ms — 69.00 76.00 ms — 86.00 — ms 9.14 4.00 15.00 ...

Page 7

... AH t CSS t RDS t RDCY =50pF RDH L t RDW t RCSH t WRS t WRCY t WRW WCSH MSM6636B =AV =5V±10%, Ta=–40 to +85° Min. Max. Unit 65 — 65 — 5 — 50 — 20 — 160 — — 70 — — 0 — 100 — ...

Page 8

... Semiconductor Parallel Interface Timing ALE AD0-7 t CSS CS RD ALE AD0 RDS Address t RD Read Timing t WRS Address Write Timing MSM6636B Data Output t RDH t RDW t RCSH Data Input WRW t WCSH 8/13 ...

Page 9

... Timing When Automatic Address Increment is Used ALE AD0-7 Address CS RD ALE AD0-7 Address RDS Data Output Data Output RDH RDCY t RDW Read Timing t WRS Data Input Data Input WRCY t WRW Write Timing MSM6636B Data Output Data Input 9/13 ...

Page 10

... Note: The time chart shows the wakeup input signals from each sleep status Symbol Min 400 MSM6636B =AV =5V±10%, Ta=–40 to +85°C DD Typ. Max. Unit ms — — — — — — 10/13 ...

Page 11

... DV =AV =5V±10%, Ta=–40 to +85°C, In setting 41.6 kbps DD DD Symbol Min Symbol Min. t 0.1 RES t RES MSM6636B Typ. Max. Unit 5 — — — — — — — — =AV =5V±10%, Ta=–40 to +85°C ...

Page 12

... CLKOUT RES 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 recommended to connect a small-capacitance bypass capacitor and a large-capacitance filter capacitor serially. The typical capacitors are as follows: ...

Page 13

... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM6636B (Unit : mm) Package material Epoxy resin ...

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