Freescale Semiconductor
Advance Information
Document Number: MC33784
Rev 3.0, 11/2009
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
33784
SENSOR INTERFACE
EF SUFFIX (PB-FREE)
98ASB42566B
16-LEAD SOICN
ORDERING INFORMATION
Device
MCZ33784EF/R2
Temperature
Range (T
A
)
- 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
TEST2
V
CC
BUSIN
RTNIN
33784
BUSOUT
RTNOUT
To other
33784
Slaves
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.
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