MC33389

MOTOROLA

32

MC33389

APPLICATION

Figure 60. Typical Application Schematic 1

Figure 61. Typical Application: V3 used as auxilaary ECU supply - Reset Duration Extension

Figure 62. Typical Application Schematic

V1

Vbat

V2

Reset

INT

CSB

MISO

MOSI

SCK

Tx

Rx

CANH

CANL

Rtl

Rth

V3

L0

L1

L2

C3

C4

C5

C6

C1

C2

Rp0

RL

RH

Gnd

Gnd

CAN

SPI

Vdd

int

reset

Auxillary 5V

Auxillary 12V

S0

Rs0

CL0

Rp1

S1

Rs1

CL1

Rp2

S2

Rs2

CL2

Ignition

CAN bus

C1: 22uF

C2: 100nF

C3: 22uF esr <10 ohms

C4: 100nF

C5: 22uF esr < 10 ohms

C6: 100nF

RH> 500 ohms

RL> 500 ohms

Rp0,1,2: 22k

Rs0,1,2: 22 k

CL0,1,2: 10nF

(V3 supplies switch pull up resistors. Sleep mode with cyclic sense).

(V3 supplies local switch 12V.

Vbat

V3

L0

L1

L2

C1

C2

Rp0

Gnd

Auxillary local 12V

S0

Rs0

CL0

Rp1

S1

Rs1

CL1

Rp2

S2

Rs2

CL2

Ignition

switch

Switch pull up resistors supplied

Sleep mode without cyclic sense).

from Switch battery line.

V1

Reset

C3

C4

Vdd

reset

MC33389

Cr

Micro

Reset duration extension

V1

Vbat

V2

Reset

INT

CSB

MISO

MOSI

SCK

Tx

Rx

CANH

CANL

Rtl

Rth

V3

L0

L1

L2

C5

C6

C1

C2

Rp0

RL

RH

Gnd

Gnd

CAN 1

SPI

Vdd

int

reset

Auxillary 5V

Auxillary 12V

S0

Rs0

CL0

Ignition

CAN bus # 1

CANH

CANL

Rtl

Rth

RL

RH

CAN bus # 2

Gnd

Inh

MC33388

LIN

1k

LIN bus

Gnd

Inh

MC33399

+12V

Vbat

Vdd

Vsup

CAN 2

SCI

SPI bus

Tx/Rx

Tx/Rx

(Wake up input linked to pe-

ripheral circuits: (ex: low speed

CAN or LIN transceivers).

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com