33480 datasheet(3/39 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33480

TERMINAL CONNECTIONS

Figure 3. 33480 Terminal Connections (Transparent Top View Of Package)

Table 1. 33480 Terminal Definitions

A functional description of each terminal can be found in the Functional Terminal Description section beginning on Page 17.

Terminal

Number

Terminal

Name

Terminal

Function

Formal Name

Definition

FETIN

Input

External FET Input This terminal is the current sense recopy of the external SMART MOSFET.

IGN

Input

Ignition Input

(Active High)

This input wakes the device. It also controls the Outputs 1 and 2 in case of Fail

mode activation. This terminal has a passive internal pulldown.

RSTB

Input

Reset

This input wakes the device. It is also used to initialize the device configuration

and fault registers through SPI. This digital terminal has a passive internal

pulldown.

FLASHER

Input

Flasher Input

(Active High)

This input wakes the device. The Fail mode can be activated by this digital input.

This terminal has a passive internal pulldown.

CLOCK

Input

Clock Input

The PWM frequency and timing are generated from this digital clock input by

the PWM module. This terminal has an active internal pulldown current source.

LIMP

Input

Limp Home Input

(Active High)

The Fail mode can be activated by this digital input. This terminal has an active

internal pulldown current source.

No Connect

No internal connection to this terminal.

Input

Chip Select

(Active Low)

When this digital signal is high, SPI signals are ignored. Asserting this terminal

low starts an SPI transaction. The transaction is signaled as completed when

this signal returns high. This terminal has an active internal pullup current

source.

SCLK

Input

SPI Clock Input

This digital input terminal is connected to the master microcontroller providing

the required bit shift clock for SPI communication. This terminal has an active

internal pulldown current source.

10 9

GND

OUT5

OUT4

OUT3

OUT2

OUT1

GND

CSNS

GND

VBAT

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