PIN CONNECTIONS
PIN CONNECTIONS
12 11 10
9
8
7
6
5
4
3
2
1
13
GND
TRANSPARENT
TOP VIEW
14
VPWR
15
HS
16
HS
Figure 3. 33982 Pin Connections
Table 2. Pin Definitions
Functional descriptions of many of these pins can be found in the Functional Pin Description section beginning on page 16.
Pin
Number
Pin
Function
Pin Name
Formal Name
Definition
This pin is used to output a current proportional to the high side output
current and used externally to generate a ground-referenced voltage for
the microcontroller to monitor output current.
1
CSNS
Output
Output Current
Monitoring
This pin is used to input a Logic [1] signal in order 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)
Direct Input
The Input pin is used to directly control the output.
4
5
IN
Input
This is an open drain configured output requiring an external pull-up
resistor to VDD for fault reporting.
FS
Output
Fault Status
(Active Low)
The value of the resistance connected between this pin and ground
determines the state of the output after a watchdog timeout occurs.
6
7
8
9
FSI
CS
Input
Input
Input
Input
Fail-Safe Input
This input pin is connected to a chip select output of a master
microcontroller (MCU).
Chip Select
(Active Low)
This input pin is connected to the MCU providing the required bit shift
clock for SPI communication.
SCLK
SI
Serial Clock
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 in 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)
33982
Analog Integrated Circuit Device Data
Freescale Semiconductor
4
FREESCALE [ Freescale ]
