33903 datasheet(16/104 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33903/4/5

PIN CONNECTIONS

N/A

VSENSE

Input

Sense input

Direct battery voltage input sense. A

serial resistor is required to limit the input

current during high voltage transients.

N/A

I/O-1

Input/

Output

Input Output

Configurable pin as an input or output,

for connection to external circuitry

(switched or small load). The voltage

level can be read by the SPI and the

MUX output pin. The input can be used

as a programmable Wake-Up input in

(LP) Mode. It can be used in association

with

I/O-0 for a cyclic sense function in (LP)

Mode.

RST

Output

Reset Output

(Active LOW)

This is the device reset output whose

main function is to reset the MCU. This

pin has an internal pull-up to VDD. The

reset input voltage is also monitored in

order to detect external reset and safe

conditions.

INT

Output

Interrupt

Output

(Active LOW)

This output is asserted low when an

enabled interrupt condition occurs. This

pin is an open drain structure with an

internal pull up resistor to VDD.

Input

Chip Select

(Active LOW)

Chip select pin for the SPI. When the CS

is low, the device is selected. In (LP)

Mode with VDD ON, a transition on CS is

a Wake-Up condition

SCLK

Input

Serial Data

Clock

Clock input for the Serial Peripheral

Interface (SPI) of the device

MOSI

Input

Master Out/

Slave In

SPI data received by the device

MISO

Output

Master In/

Slave Out

SPI data sent to the MCU. When the CS

is high, MISO is high-impedance

VDD

Output

Voltage

Digital Drain

5.0 or 3.3 V output pin of the main

regulator for the Microcontroller supply.

TXD

Input

Transmit Data CAN bus transmit data input. Internal

pull-up to VDD

RXD

Output

Receive Data CAN bus receive data output

N/A

Voltage

Emitter

Connection to the external PNP path

transistor. This is an intermediate current

supply source for the VDD regulator

N/A

Output

Voltage Base Base output pin for connection to the

external PNP pass transistor

EX PAD EX PAD EX PAD EX PAD EX PAD EX PAD

GND

Ground

Table 2. 33903/4/5 Pin Definitions (continued)

A functional description of each pin can be found in the Functional Pin Description section beginning on page 34.

54 Pin

33905D

32 Pin

33905S

32 Pin

33904

32 Pin

33903

32 Pin

33903D

32 Pin

33903S

Pin Name

Function

Formal

Name

Definition

33903 Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc

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