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MC33780| Datasheet

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MC33780| Datasheet

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Freescale Semiconductor Advance Information

Document Number: MC33780 Rev 4.0, 11/2006

Dual DBUS Master with Differential Drive and Frequency Spreading
The 33780 is a master device for two differential DBUS buses. It contains the logic to interface the buses to a standard serial peripheral interface (SPI) port and the analog circuitry to drive data and power over the bus as well as receive data from the remote slave devices. The differential mode of the 33780 generates lower electromagnetic interference (EMI) in situations where data rates and wiring make this a problem. Frequency spreading further reduces interference by spreading the energy across many channels, reducing the energy in any single channel. Features Two Independent DBUS I /Os Common SPI Interface for All Operations Open-Drain Interrupt Output with Pull-up Maskable Interrupts for Send and Receive Data Status Automatic Message Cyclical Redundancy Checking (CRC) Generation and Checking Four-Stage Transmit and Receive Buffers 8- to 16-Bit Messages with 0- to 8-Bit CRC Independent Frequency Spreading for Each Channel Pb-Free Packaging Designated by Suffix Code EG

33780

DIFFERENTIAL DBUS MASTER

EG (PB-FREE SUFFIX) 98ASB42567B 16-PIN SOICW

ORDERING INFORMATION
Device MC33780EG/R2 MCZ33780EG/R2 -40 C to 85 C 16 SOICW Temperature Range (TA) Package

+5.0 V

+25 V

MCU VCC SCLK CS MOSI MISO RST INT CLK GND VCC

33780 VSUP Twisted Pair SCLK CS MOSI MISO RST INT CLK GND D0H D0L D1H D1L DSI/DBUS SLAVE 33793

DSI/DBUS SLAVE 33793

4.7 nF capacitors from D0H, D0L, D1H and D1L to circuit ground are required for proper operation.

Figure 1. 33780 Simplified Application Diagram

* This document contains certain information on a new product. Specifications and information herein are subject to change without notice.

Freescale Semiconductor, Inc., 2006. All rights reserved.


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