Document Number: MC33784
Rev 3.0, 11/2009
Freescale Semiconductor
Advance Information
DSI 2.02 Sensor Interface
33784
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.
SENSOR INTERFACE
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
EF SUFFIX (PB-FREE)
98ASB42566B
16-LEAD SOICN
ORDERING INFORMATION
Temperature
Package
Device
Range (T )
A
MCZ33784EF/R2
-40°C to 125°C
16 SOICN
33781
33784
33784
BUS
REGOUT
RTNIN
AGND
AN0
BUSOUT
RTNOUT
BUSIN
To other
33784
Slaves
BUSIN
RTNIN
BUSOUT
RTNOUT
AN1
H_CAP
IDDQ
I/O0
I/O1
TEST1
I/O2
TOUT
TEST2
VCC
XY
ACCELEROMETER
AGND
Figure 1. 33784 Simplified Application Diagram
(Daisy Chain Shown)
* 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.