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Freescale Semiconductor Electronic Components Datasheet

MC33784 Datasheet

DSI 2.02 Sensor Interface

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Freescale Semiconductor
Advance Information
DSI 2.02 Sensor Interface
The 33784 is a slave, Distributed System Interface Bus (DBUS),
version 2.02 compatible device, optimized as a sensor interface. The
device contains circuits to power sensors such as accelerometers,
and to digitize the analog level from the sensor. The device is
controlled by commands over the bus, and returns measured data
and other information over the bus.
Features
• DSI version 2.02 compatible
• 2-channel, 10-bit analog-to-digital converter (ADC)
• 3 pins configurable as logic inputs or outputs
• Provides regulated +5.0v output for sensor power from bus
• On-board clock (no external elements required)
• Includes bus switches on bus and bus return
• Pb-free packaging designated by suffix code EF
Document Number: MC33784
Rev 3.0, 11/2009
33784
SENSOR INTERFACE
EF SUFFIX (PB-FREE)
98ASB42566B
16-LEAD SOICN
ORDERING INFORMATION
Device
MCZ33784EF/R2
Temperature
Range (TA)
-40°C to 125°C
Package
16 SOICN
33781
BUS
33784
REGOUT
RTNIN
AGND
AN0
AN1
I/O0
I/O1
I/O2
BUSOUT
RTNOUT
BUSIN
H_CAP
IDDQ
TEST1
TOUT
VCC XY
ACCELEROMETER
TEST2
33784
BUSIN
RTNIN
BUSOUT
RTNOUT
AGND
Figure 1. 33784 Simplified Application Diagram
(Daisy Chain Shown)
To other
33784
Slaves
* This document contains certain information on a new product.
Specifications and information herein are subject to change without notice.
© Freescale Semiconductor, Inc., 2008 - 2009. All rights reserved.
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Freescale Semiconductor Electronic Components Datasheet

MC33784 Datasheet

DSI 2.02 Sensor Interface

No Preview Available !

MC33784 pdf
www.DataSheet.co.kr
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
BUSIN
I/O0
I/O1
I/O2
TEST1
TEST2
RTNIN
Rectifier
High Side Bus Switch
0-35 V
Receiver
Bandgap
Reference
Data
Frame
Received
Message
from MCU
Response
Current
0 – 11mA
8.0mA/μs
Bus Return
Oscillator
10MHz
DataOut <2.0>
I/O Buffers
DataOut <0>
Logic
Command Decode
State Machine
Response Generation
DataOut <1>
DataOut <2>
SEL
MUX
10-Bit
ADC
H_CAP
2.2μF or
4.7μF
Typical
BUSOUT
TOUT
Power
Management
5.0V Regulator
BG Reference
Bias Currents
POR
REGOUT
CRO = 2.2μF
AGND
IDDQ
Low Side Bus Switch
AN0
AN1
RTNOUT
Figure 2. 33784 Simplified Internal Block Diagram
33784
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
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Part Number MC33784
Description DSI 2.02 Sensor Interface
Maker Freescale Semiconductor
Total Page 30 Pages
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