33784 Datasheet, PDF (3/30 Pages) Freescale Semiconductor, Inc – DSI 2.02 Sensor Interface

PIN CONNECTIONS
PIN CONNECTIONS
REGOUT ¹
16 H_CAP
TEST2 2
15 BUSIN
I/O0 3
14 BUSOUT
I/O1 4
13 RTNIN
I/O2 5
12 RTNOUT
AN0 6
11 TOUT
AGND 7
10 IDDQ
AN1 8
9 TEST1
Figure 3. 33784 Pin Connections
Table 1. 33784 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 10.
Pin Number Pin Name
Pin
Function
Formal Name
Definition
1
REGOUT
Output
Regulator ^{Pin provides a regulated 5.0V output. The power is derived from the bus.}
Output
2
TEST2
Test
Test2
This pin must be grounded in the application.
3
I/O0
Input/Output
Logic I/O
Pins can be used to provide a logic level output or a logic input.
4
I/O1
5
I/O2
6, 8
AN0,AN1
Input
Analog Input ^{Inputs to the ADC.}
7
AGND
Ground
Analog Ground Pin is the low reference level and power return for the analog-to-digital
Reference
converter (ADC). It is internally connected to RTNIN.
9
TEST1
Test
Test1
This pin must be grounded in the application.
10
IDDQ
Test
IDDQ
Input pin for measuring device quiescent current. Must be left open in the
application.
11
TOUT
Test
Test Output ^{This pin must be grounded in the application.}
12
RTNOUT
Power
Bus Return Switched RTNIN pin, attaches to the next RTNIN pin in the daisy chain.
13
RTNIN
Power
Bus Return ^{Pin attaches to the low side of the differential bus, and provides the common}
return for power and signalling. It is internally connected to AGND.
14
BUSOUT
Output
DBUS Output Switched BUSIN Pin, attaches to the next BUSIN pin in the daisy chain.
15
BUSIN
Input
DBUS Input ^{Pin attaches to the high side of the differential bus and responds to}
initialization commands.
16
H_CAP
Output
Holding
A capacitor attached to this pin is charged by the bus during bus idle and
Capacitor ^{supplies current to run the device and for external devices via the REGOUT}
pin during non-idle periods.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33784
3