PIN CONNECTIONS
PIN CONNECTIONS
12 11 10
9
8
7
6
5
4
3
2
1
13
GND
TRANSPARENT
TOP VIEW
14
VPWR
16
HS0
15
HS1
Figure 3. 33984 Pin Connections (Transparent Top View)
Table 2. Pin Definitions
Functional descriptions of many of these pins can be found in the Functional Pin Description section beginning on page 17.
Pin
Function
Pin
Pin Name
Formal Name
Definition
This pin is used to output a current proportional to the designated
HS0-1 output.
1
CSNS
Output
Output Current Monitoring
This pin is used to input a Logic [1] signal so as to enable the
watchdog timer function.
2
3
WAKE
RST
Input
Input
Wake
This input pin is used to initialize the device configuration and fault
registers, as well as place the device in a low current Sleep mode.
Reset (Active Low)
This input pin is used to directly control the output HS0.
4
5
IN0
FS
Input
Direct Input 0
This is an open drain configured output requiring an external pull-up
resistor to VDD for fault reporting.
Output
Fault Status (Active Low)
The value of the resistance connected between this pin and ground
determines the state of the outputs after a watchdog timeout occurs.
6
7
8
9
FSI
CS
Input
Input
Input
Input
Fail-safe Input
Chip Select (Active Low)
Serial Clock
This input pin is connected to a chip select output of a master
microcontroller (MCU).
This input pin is connected to the MCU providing the required bit shift
clock for SPI communication.
SCLK
SI
This is a command data input pin connected to the SPI Serial Data
Output of the MCU or to the SO pin of the previous device of a daisy
chain of devices.
Serial Input
This is an external voltage input pin used to supply power to the SPI
circuit.
10
VDD
Input
Digital Drain Voltage
(Power)
33984
Analog Integrated Circuit Device Data
Freescale Semiconductor
4
FREESCALE [ Freescale ]
