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33781 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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33781 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 44 page  Document Number: MC33781 Rev. 4.0, 7/2008 Freescale Semiconductor Advance Information * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2007-2008. All rights reserved. Quad DSI 2.02 Master with Differential Drive and Frequency Spreading The 33781 is a master device for four differential DSI 2.02 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 33781 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 frequencies, reducing the energy in any single frequency. Features • Four independent differential DSI (DBUS) channels • Dual SPI interface • Enhanced bus fault performance • Automatic message cyclical redundancy checking (CRC) generation and checking for each channel • Enhanced register set with addressable buffer allows queuing of 4 independent slave commands at one time for each channel • 8- to 16-Bit messages with 0- to 8-Bit CRC • Independent frequency spreading for each channel • Pseudo bus switch feature on channel 0 • Pb-free packaging designated by suffix code E K Figure 1. 33781 Simplified Application Diagram DIFFERENTIAL DSI 2.02 MASTER 33781 ORDERING INFORMATION Device Temperature Range (TA) Package PCZ33781E K/R2 -40°C to 90°C 32 SOICW EP E K SUFFIX (PB-FREE) 98ASA10556D 32-PIN SOICW EP VCC SCLK0 CS0 MOSI0 MISO0 RST CLK SCLK1 MISO1 CS1 VSUP1 DPH DPL D0H D0L D1H D1L D2H D2L VCC SCLK CS MOSI MISO RST CLK MCU1 33781 MCU2 SCLK1 MISO1 CS1 GND +5.0V GND D3H D3L GND 2.2nF capacitors from DOH, D0L, D1H, D1L, D2H, D2L, D3H and D3L to circuit ground are required for proper operation DBUS SLAVE DBUS SLAVE DBUS SLAVE DBUS SLAVE DBUS SLAVE +25V VDD VSS_IDDQ AGND VSS 1.0 μF 0.1 μF |
Número de pieza similar - 33781 |
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Descripción similar - 33781 |
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