33389 datasheet(5/49 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33389

PIN CONNECTIONS

Table 2. 33389 Pin Definitions: SOICW 28-Lead

A functional description of each pin can be found in the Functional Pin Description section beginning on page 17.

Pin Number

Name

Formal Name

Definition

Transmitter Data

Transmitter input of the LS CAN interface

Voltage Regulator

One

This 5.0 V pin is a 3% low drop voltage regulator dedicated to the microcontroller supply.

Receiver Data

Receiver output of the LS CAN interface

RST

Reset

This is an Input/Output pin.

INT

Interrupt

This output is asserted LOW when an enabled interrupt condition occurs.

6 -9 20 - 23

GND

Ground

These device ground pins are internally connected to the package lead frame to provide

a 33389-to-PCB thermal path.

MISO

Master In/Slave Out

This pin is the tri-state output from the shift register.

MOSI

Master Out/Slave In

This pin is for the input of serial instruction data.

SCLK

System Clock

This pin clocks the internal shift registers.

Chip Select

This pin communicates with the system MCU and enables SPI communication.

14, 15, 16

L0: L2

Wake-up Input

(L0: L2)

Input interfaces to external circuitry. Levels at these pins can be read by SPI and input

can be used as programmable wake-up input in Sleep or Stop mode.

No Connect

This pin does not connect.

RTH

Thermal Resistance

High

Pin for the connection of the bus termination to CANH

CANL

CAN Low

CAN low input/output

CANH

CAN High

CAN high input/output

Voltage Regulator

Two

This 5.0 V pin is a low drop voltage regulator dedicated to the peripherals supply.

RTL

Thermal Resistance

Low

Pin for the connection of the bus termination to CANL

VBAT

Voltage Battery

This pin is voltage supply from the battery.

Voltage Regulator

Three

This pin is a 10

Ω switch to V

BAT, used to supply external contacts or relays.

CANH

GND

CANL

RTH

VBAT

RTL

RST

INT

GND

MISO

MOSI

SCLK

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