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33781_09

更新时间: 2022-09-18 16:05:42
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飞思卡尔 - FREESCALE /
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44页 943K
描述
Quad DSI 2.02 Master with

33781_09 数据手册

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Document Number: MC33781  
Rev. 5.0, 11/2009  
Freescale Semiconductor  
Advance Information  
Quad DSI 2.02 Master with  
Differential Drive and  
Frequency Spreading  
33781  
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.  
DIFFERENTIAL DSI 2.02 MASTER  
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.  
EK SUFFIX (PB-FREE)  
98ASA10556D  
32-PIN SOICW EP  
Features  
• Four independent differential DSI (DBUS) channels  
• Dual SPI interface  
ORDERING INFORMATION  
Temperature  
• 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 EK  
Device  
Package  
Range (T )  
A
MCZ33781EK/R2  
-40°C to 90°C  
32 SOICW EP  
+5.0V  
+25V  
33781  
VCC  
SCLK  
CS  
VCC  
VSUP1  
DPH  
DPL  
D0H  
D0L  
1.0μF  
DBUS SLAVE  
SCLK0  
CS0  
DBUS SLAVE  
DBUS SLAVE  
DBUS SLAVE  
DBUS SLAVE  
MCU1  
MOSI  
MISO  
RST  
MOSI0  
MISO0  
RST  
D1H  
D1L  
CLK  
CLK  
GND  
D2H  
D2L  
VDD  
0.1μF  
VSS_IDDQ  
SCLK1  
D3H  
D3L  
SCLK1  
MISO1  
CS1  
MISO1  
MCU2  
CS1  
AGND GND  
VSS  
2.2nF capacitors from DOH, D0L,  
D1H, D1L, D2H, D2L, D3H and D3L  
to circuit ground are required for  
proper operation  
GND  
Figure 1. 33781 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., 2007-2009. All rights reserved.  

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