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Fabricante

33389

System Basis Chip with Low Speed Fault Tolerant CAN

Freescale Semiconductor 

PIN CONNECTIONS

PIN CONNECTIONS

TX 1

V1 2

RX 3

RST 4

INT 5

MISO 6

MOSI 7

SCLK 8

CS 9

L2 10

20 V3

19 VBAT

18 RTL

17 V2

16 CANH

15 GND

14 CANL

13 RTH

12 L0

11 L1

Figure 3. 33389 Pin Connections

Table 1. 33389 Pin Definitions: HSOSP 20-Lead

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

Pin Number Pin Name

Formal Name

Definition

1

2

3

4

5

6

7

8

9

10 - 12

13

14

15

16

17

18

19

20

TX

V1

RX

RST

INT

MISO

MOSI

SCLK

CS

L0 - L2

RTH

CANL

GND

CANH

V2

RTL

VBAT

V3

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

Reset

This is an Input/Output pin.

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

Master In/Slave Out This pin is the tri-state output from the shift register.

Master Out/Slave In This pin is for the input of serial instruction data.

System Clock

This pin clocks the internal shift registers.

Chip Select

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

Level 0 - 2 inputs

(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.

RTH

Pin for the connection of the bus termination to CANH

CAN Low

CAN low input/output

Ground

This pin is the ground of the integrated circuit.

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

Pin for the connection of the bus termination to CANL

Voltage Battery This pin is voltage supply from the battery.

Voltage Regulator This pin is a 10 Ω switch to VBAT, used to supply external contacts or relays.

Three

33389

4

Analog Integrated Circuit Device Data

Freescale Semiconductor

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