
Close:
Weak brake control
Still closer:
Strong brake control
Close:
Light winding
Still closer:
Strong winding
Millimeter-
wave
output
Proximity
information
CAN bus
Reflected
wave
input
CAN
MCU
CAN
MCU
CAN
MCU
CAN
MCU
Proximity
information
CAN bus
CAN / Body CAN / PowertrainCAN / ITS
Proximity
warning
indicator
Warning
buzzer
Proximity information
Car speed
Accelerator opening
Amount of
brakes applied
CAN bus
Wheel speed
sensor
feedback
Brake control
Proximity
information
Car speed
CAN bus
Winding
control
(Motor drive)
Close:
Warned by an indicator
and sound.
Gateway
Lamp
on/off
information
LIN bus
Lamp
on/off information
Door mirror
open/closed and
position information
LIN bus
LIN
MCU
Lamp on/off
Door mirror
open/closed and
position information
LIN bus
LIN
MCU
Door mirror
open/closed
and position
adjustment
CAN bus
LIN
MCU
Door locked/
unlocked
Wireless
reception
Other door
peripheral
inputs
Other door
peripheral outputs
Card key
Door ECU
Door unlocked
Room lamp ECU
Headlight ECU
Door mirror
ECU
Room mirror ECU
Seat
ECU
Hazard light ECU
Amount of
brakes applied
FlexRay bus
FlexRay
MCU
FlexRay
MCU
Pedal
position
information
Proximity information
Car speed
Accelerator opening
Amount of
brakes applied
FlexRay bus
Wheel speed
sensor
feedback
Brake control
FlexRay Bus Ch.A
FlexRay Bus Ch.B
GS
G sensor
data
input
OS OS GS GS GS
Squib
Squib
Squib
Squib
Sensor
data
Sensor
data
Occupant detection
information
Occupant detection
information
Squib ignition command Squib ignition
OS
Occupied
Sensor
G Sensor
Squib
Airbag ignition
equipment
G sensor
data
input
G sensor
data
input
Occupant detection
information
Airbag
main
ECU
Seat beltSeat belt
pretentionerpretentioner
Seat belt
pretentioner
Airbag burst
Airbag burstAirbag burst
Collision Detection
System
Multifunction Keyless
System
Next Generation Air Bag System
Brake-by-Wire System
CAN MCU / LIN master LIN slave LIN slave
CAN
Controller Area Network
CAN currently is the de-facto standard protocol among in-vehicle networking.
Not just in the basic trunk network, it is widely used in the powertrain and body
systems, too.
LIN is a single-master in-vehicle networking protocol that excels
in cost/performance ratio.
It is used in switch input and sensor input actuator control.
FlexRay
X-by-Wire
FlexRay is a high-speed com-
munication protocol featuring
superior flexibility and high reli-
ability.
Devised by automobile and
electrical equipment manufac-
turers and semiconductor ven-
dors, it is watched as a most
promising in-vehicle networking
protocol for the next generation
X-by-Wire system.
ASRB
Safe-by-Wire Plus
ASRB is a protocol designed for
the inclusion of ignition sys-
tems, such as collision sensors
and airbags, in the Networking
system.
It is watched with interest as an
in-vehicle networking protocol
for the next generation air bag
system.
LIN
Local Interconnect Network
Door control Light control Door mirror control etc.
The door is unlocked when a person
who has a card key approaches the
car.
Door unlocking signals such as
flashing of a headlight, lighting of a
room lamp or flashing of a hazard
lamp.
The room mirror, seat and door
mirror positions are automatically
adjusted to suit the registered driver
position.
Millimeter-wave radar Dashboard Brake control Seat belt control
Brake pedal control Brake control
Occupant detection
Airbag control
Collision detection
Environment-friendly cars, safe and comfortable cars,
cars we all want to drive.
Renesas technology supports these ideals.
Distance between cars
measured with a millimeter-
wave radar.
Supporting automotive evolution
Supporting the expansion of In-Vehicle Networking
Renesas MCU for In-Vehicle Networking
Introduction 5
Introduction
Introduction
09 10
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