<s>
IEBus	B-General_Concept
(	O
Inter	O
Equipment	O
Bus	O
)	O
is	O
a	O
communication	O
bus	O
specification	O
"	O
between	O
equipments	O
within	O
a	O
vehicle	O
or	O
a	O
chassis	O
"	O
of	O
Renesas	O
Electronics	O
.	O
</s>
<s>
It	O
defines	O
OSI	O
model	O
layer	B-Application
1	I-Application
and	O
layer	B-Protocol
2	I-Protocol
specification	O
.	O
</s>
<s>
IEBus	B-General_Concept
is	O
mainly	O
used	O
for	O
car	O
audio	O
and	O
car	B-Application
navigations	I-Application
,	O
which	O
established	O
de	O
facto	O
standard	O
in	O
Japan	O
,	O
though	O
SAE	O
J1850	O
is	O
major	O
in	O
United	O
States	O
.	O
</s>
<s>
IEBus	B-General_Concept
is	O
also	O
used	O
in	O
some	O
vending	O
machines	O
,	O
which	O
major	O
customer	O
is	O
Fuji	O
Electric	O
.	O
</s>
<s>
Each	O
button	O
on	O
the	O
vending	O
machine	O
has	O
an	O
IEBus	B-General_Concept
ID	O
,	O
i.e.	O
</s>
<s>
Detailed	O
specification	O
is	O
disclosed	O
to	O
licensees	B-Application
only	O
,	O
but	O
protocol	B-Protocol
analyzers	I-Protocol
are	O
provided	O
from	O
some	O
test	O
equipment	O
vendors	O
.	O
</s>
<s>
Its	O
modulation	O
method	O
is	O
PWM	O
(	O
Pulse-Width	B-Algorithm
Modulation	I-Algorithm
)	O
with	O
6.00MHz	O
base	O
clock	O
originally	O
,	O
but	O
most	O
of	O
automotive	O
customers	O
use	O
6.291MHz	O
,	O
and	O
physical	B-Application
layer	I-Application
is	O
a	O
pair	O
of	O
differential	O
signalling	O
harness	O
.	O
</s>
<s>
Its	O
physical	B-Application
layer	I-Application
adopts	O
half-duplex	O
,	O
asynchronous	O
,	O
and	O
multi-master	B-Architecture
communication	O
with	O
carrier-sense	O
multiple	O
access	O
with	O
collision	O
detection	O
(	O
CSMA/CD	O
)	O
for	O
medium	B-Protocol
access	I-Protocol
control	I-Protocol
.	O
</s>
<s>
In	O
formal	O
,	O
it	O
is	O
"	O
IEBus.	O
"	O
</s>
<s>
IEBus®	O
and	O
Inter	O
Equipment	O
Bus®	O
are	O
registered	O
trademark	O
symbols	O
of	O
Renesas	O
Electronics	O
Corporation	O
,	O
formerly	O
NEC	O
Electronics	O
Corporation	O
,	O
(	O
JPO	O
:	O
Reg	O
.	O
</s>
<s>
IEBus	B-General_Concept
is	O
introduced	O
as	O
a	O
solution	O
for	O
the	O
distributed	O
control	O
system	O
.	O
</s>
<s>
IEBus	B-General_Concept
is	O
also	O
a	O
similar	O
specification	O
(	O
refer	O
to	O
"	O
Transfer	O
signal	O
format	O
"	O
section	O
)	O
,	O
but	O
not	O
listed	O
in	O
this	O
criteria	O
.	O
</s>
<s>
As	O
the	O
result	O
,	O
IEBus	B-General_Concept
becomes	O
a	O
de	O
facto	O
standard	O
of	O
car	O
audio	O
in	O
Japan	O
.	O
</s>
<s>
Regarding	O
the	O
replacement	O
of	O
IEBus	B-General_Concept
,	O
a	O
paper	O
by	O
Hyundai	O
Autonet	O
,	O
currently	O
Hyundai	O
Mobis	O
,	O
</s>
<s>
"	O
In	O
communication	O
methods	O
for	O
digital	O
input	O
capable	O
amplifiers	O
,	O
Inter	O
Equipment	O
Bus	O
(	O
IEBus	B-General_Concept
)	O
was	O
used	O
in	O
early	O
times	O
,	O
but	O
for	O
now	O
,	O
Controller	B-Protocol
Area	I-Protocol
Network	I-Protocol
(	O
CAN	B-Protocol
)	O
is	O
mainly	O
used.	O
"	O
</s>
<s>
Only	O
one	O
device	O
can	B-Protocol
talk	O
on	O
the	O
bus	O
at	O
any	O
given	O
time	O
.	O
</s>
<s>
Each	O
communication	O
from	O
master	O
to	O
slave	O
must	O
be	O
replied	O
to	O
by	O
the	O
slave	O
going	O
back	O
to	O
the	O
master	O
with	O
acknowledge	B-Protocol
bits	O
each	O
of	O
those	O
show	O
ACK	B-Protocol
or	O
NAK	B-Protocol
.	O
</s>
<s>
If	O
the	O
master	O
does	O
not	O
receive	O
the	O
ACK	B-Protocol
within	O
a	O
predefined	O
time	O
allowance	O
for	O
a	O
mode	O
,	O
it	O
drops	O
the	O
communication	O
and	O
returns	O
to	O
its	O
standby	O
(	O
listen	O
)	O
mode	O
.	O
</s>
<s>
Detailed	O
specification	O
of	O
OSI	O
model	O
layer	B-Protocol
2	I-Protocol
is	O
disclosed	O
to	O
licensees	B-Application
only	O
,	O
but	O
protocol	B-Protocol
analyzers	I-Protocol
are	O
provided	O
from	O
some	O
test	O
equipment	O
vendors	O
.	O
</s>
<s>
An	O
open-source	B-Application
software	I-Application
emulator	B-Application
called	O
"	O
IEBus	B-General_Concept
Studio	O
"	O
exists	O
on	O
a	O
repository	B-General_Concept
of	O
SourceForge	B-Application
,	O
but	O
the	O
last	O
update	O
was	O
on	O
2008-02-24	O
.	O
</s>
<s>
Another	O
open-source	B-Application
analyzer	O
software	O
called	O
"	O
IEBusAnalyzer	O
"	O
is	O
available	O
on	O
GitHub	B-Application
repository	B-General_Concept
.	O
</s>
<s>
All	O
the	O
units	O
connected	O
to	O
the	O
IEBus	B-General_Concept
can	B-Protocol
transfer	O
data	O
to	O
the	O
other	O
units	O
.	O
</s>
<s>
By	O
using	O
the	O
broadcast	O
communication	O
function	O
,	O
however	O
,	O
communication	O
can	B-Protocol
be	O
executed	O
from	O
one	O
unit	O
to	O
plural	O
units	O
as	O
follows	O
:	O
</s>
<s>
The	O
effective	O
transmission	O
rate	O
can	B-Protocol
be	O
selected	O
from	O
the	O
following	O
three	O
communication	O
modes	O
:	O
</s>
<s>
The	O
priority	O
of	O
occupying	O
IEBus	B-General_Concept
is	O
as	O
follows	O
:	O
</s>
<s>
In	O
broadcast	O
communication	O
,	O
the	O
value	O
of	O
the	O
acknowledge	B-Protocol
bit	O
is	O
ignored	O
.	O
</s>
<s>
Each	O
IEBus	B-General_Concept
bit	O
consists	O
of	O
four	O
periods	O
.	O
</s>
<s>
Each	O
manufacturer	O
has	O
its	O
own	O
name	O
,	O
but	O
it	O
is	O
not	O
an	O
alias	O
of	O
IEBus	B-General_Concept
.	O
</s>
<s>
Those	O
are	O
specifications	O
of	O
wire	O
harness	O
which	O
comprise	O
control	O
cables	O
based	O
on	O
IEBus	B-General_Concept
,	O
OSI	O
model	O
layer	O
3	O
and	O
above	O
communication	O
protocol	O
,	O
audio	O
cables	O
,	O
interconnection	O
couplers	O
,	O
and	O
so	O
on	O
.	O
</s>
<s>
Pioneer	O
Corporation	O
employed	O
IEBus	B-General_Concept
for	O
its	O
original	O
branded	O
car	O
audio	O
in	O
early	O
'	O
90s	O
.	O
</s>
<s>
In	O
its	O
earlier	O
stage	O
,	O
it	O
was	O
used	O
just	O
for	O
control	O
bus	O
between	O
the	O
head	O
unit	O
in	O
dashboard	B-Protocol
and	O
the	O
CD	B-Device
changer	O
usually	O
placed	O
in	O
trunk	O
room	O
.	O
</s>
<s>
Pioneer	O
Corporation	O
pushed	O
Toyota	O
Motor	O
Corporation	O
to	O
adopt	O
IEBus	B-General_Concept
as	O
the	O
genuine	O
parts	O
.	O
</s>
<s>
In	O
1994	O
,	O
Toyota	O
decided	O
to	O
employ	O
IEBus	B-General_Concept
for	O
its	O
genuine	O
specification	O
,	O
</s>
<s>
Honda	O
also	O
decided	O
to	O
adopt	O
IEBus	B-General_Concept
as	O
its	O
genuine	O
parts	O
specification	O
just	O
after	O
Toyota	O
do	O
so	O
.	O
</s>
<s>
Its	O
digital	B-Application
media	I-Application
receiver	I-Application
equipment	O
utilizes	O
IEBus	B-General_Concept
.	O
</s>
<s>
are	O
Renesas	O
official	O
promotion	O
boards	O
of	O
RX63N	O
chip	O
,	O
which	O
enables	O
IEBus	B-General_Concept
mode	O
0	O
and	O
1	O
,	O
but	O
not	O
mode	O
2	O
,	O
i.e.	O
</s>
<s>
To	O
evaluate	O
IEBus	B-General_Concept
,	O
an	O
external	O
5V	O
bus	O
interface	O
transceiver	O
(	O
driver/receiver	O
)	O
IC	O
extension	O
is	O
required	O
.	O
</s>
<s>
The	O
transceiver	O
needs	O
to	O
correspond	O
to	O
3.3V	O
microcontroller	B-Architecture
(	O
TTL	O
logic	O
voltage	O
level	O
)	O
interface	O
,	O
otherwise	O
3.3V	O
↔	O
5.0V	O
level	B-General_Concept
shifter	I-General_Concept
is	O
required	O
.	O
</s>
<s>
Semiconductor	B-Architecture
intellectual	I-Architecture
property	I-Architecture
core	I-Architecture
of	O
IEBus	B-General_Concept
is	O
available	O
via	O
IP	B-Architecture
core	I-Architecture
Exchange	O
.	O
</s>
<s>
Most	O
of	O
IEBus	B-General_Concept
controller	O
LSIs	O
require	O
external	O
dedicated	O
bus	O
interface	O
transceivers	O
(	O
driver/receiver	O
ICs	O
)	O
.	O
</s>
<s>
Each	O
IEBus	B-General_Concept
controller	O
may	O
have	O
different	O
implementation	O
as	O
long	O
as	O
the	O
specification	O
can	B-Protocol
be	O
kept	O
.	O
</s>
<s>
As	O
the	O
result	O
,	O
host	O
CPU	O
load	O
for	O
each	O
IEBus	B-General_Concept
controller	O
implementation	O
differs	O
.	O
</s>
<s>
Nowadays	O
,	O
there	O
are	O
thousands	O
of	O
microcontroller	B-Architecture
products	O
to	O
be	O
list	O
up	O
,	O
those	O
which	O
incorporate	O
various	O
different	O
IEBus	B-General_Concept
controller	O
implementations	O
.	O
</s>
<s>
the	O
world	O
's	O
first	O
"	O
IEBus	B-General_Concept
protocol	O
controller	O
"	O
is	O
usually	O
thought	O
as	O
the	O
golden	O
protocol	O
reference	O
LSI	O
.	O
</s>
<s>
This	O
device	O
supports	O
full	O
specification	O
of	O
IEBus	B-General_Concept
mode	O
0	O
,	O
1	O
,	O
and	O
2	O
.	O
</s>
<s>
It	O
processes	O
all	O
the	O
layer	B-Application
1	I-Application
and	O
2	O
of	O
IEBus	B-General_Concept
protocol	O
by	O
itself	O
.	O
</s>
<s>
It	O
is	O
connected	O
to	O
a	O
host	O
microcontroller	B-Architecture
via	O
3-line	O
serial	O
interface	O
.	O
</s>
<s>
This	O
product	O
contains	O
IEBus	B-General_Concept
interface	O
transceiver	O
.	O
</s>
<s>
the	O
second	O
generation	O
of	O
IEBus	B-General_Concept
controller	O
supports	O
mode	O
0	O
and	O
1	O
.	O
</s>
<s>
This	O
device	O
performs	O
all	O
the	O
processing	O
required	O
for	O
layers	O
1	O
and	O
2	O
of	O
IEBus	B-General_Concept
protocol	O
.	O
</s>
<s>
The	O
device	O
incorporate	O
large	O
transmission	O
and	O
reception	O
buffers	O
,	O
allowing	O
host	O
microcontroller	B-Architecture
to	O
perform	O
IEBus	B-General_Concept
operations	O
without	O
interruption	O
.	O
</s>
<s>
It	O
also	O
contain	O
an	O
IEBus	B-General_Concept
interface	O
transceiver	O
which	O
allow	O
the	O
device	O
to	O
connect	O
directly	O
to	O
the	O
IEBus	B-General_Concept
interface	O
.	O
</s>
<s>
It	O
is	O
connected	O
to	O
a	O
host	O
microcontroller	B-Architecture
via	O
3-line	O
or	O
2-line	O
serial	O
interface	O
.	O
</s>
<s>
This	O
product	O
contains	O
IEBus	B-General_Concept
interface	O
transceiver	O
.	O
</s>
<s>
is	O
a	O
bus	O
interface	O
transceiver	O
(	O
driver/receiver	O
)	O
IC	O
for	O
IEBus	B-General_Concept
with	O
typically	O
30	O
mV	O
hysteresis	O
comparator	O
input	O
.	O
</s>
<s>
is	O
a	O
bus	O
interface	O
transceiver	O
(	O
driver/receiver	O
)	O
IC	O
suitable	O
for	O
IEBus	B-General_Concept
.	O
</s>
<s>
is	O
a	O
bus	O
interface	O
transceiver	O
(	O
driver/receiver	O
)	O
IC	O
for	O
IEBus	B-General_Concept
with	O
hysteresis	O
comparator	O
input	O
.	O
</s>
<s>
It	O
looks	O
like	O
suitable	O
for	O
IEBus	B-General_Concept
,	O
but	O
the	O
result	O
by	O
a	O
person	O
is	O
not	O
reported	O
.	O
</s>
<s>
is	O
an	O
8-bit	O
single-chip	O
microcontroller	B-Architecture
with	O
on-chip	O
60K	O
bytes	O
UV-EPROM	O
,	O
2K	O
bytes	O
RAM	O
,	O
and	O
IEBus	B-General_Concept
controller	O
,	O
which	O
supports	O
mode	O
0	O
,	O
1	O
,	O
and	O
2	O
,	O
with	O
full	O
data	B-Protocol
link	I-Protocol
layer	I-Protocol
protocol	O
support	O
.	O
</s>
<s>
This	O
is	O
the	O
world	O
's	O
first	O
microcontroller	B-Architecture
which	O
incorporates	O
IEBus	B-General_Concept
controller	O
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
function	O
is	O
almost	O
the	O
same	O
as	O
that	O
of	O
µPD72042B	O
,	O
but	O
is	O
located	O
as	O
memory	O
mapped	O
I/O	O
called	O
SFR	O
(	O
special	O
function	O
registers	O
)	O
.	O
</s>
<s>
is	O
an	O
8-bit	O
single-chip	O
microcontroller	B-Architecture
with	O
on-chip	O
60K	O
bytes	O
UV-EPROM	O
,	O
2K	O
bytes	O
RAM	O
,	O
and	O
IEBus	B-General_Concept
controller	O
,	O
which	O
supports	O
mode	O
0	O
,	O
1	O
,	O
and	O
2	O
,	O
with	O
full	O
data	B-Protocol
link	I-Protocol
layer	I-Protocol
support	O
.	O
</s>
<s>
is	O
an	O
8-bit	O
single-chip	O
microcontroller	B-Architecture
for	O
DTS	O
(	O
Digital	O
Tuning	O
System	O
)	O
of	O
car	O
radio	O
,	O
which	O
incorporate	O
simplified	O
IEBus	B-General_Concept
controller	O
,	O
60K	O
bytes	O
Flash	O
ROM	O
,	O
and	O
3K	O
bytes	O
RAM	O
.	O
</s>
<s>
is	O
a	O
16-bit	O
single-chip	O
microcontroller	B-Architecture
for	O
car	O
audio	O
,	O
which	O
incorporate	O
simplified	O
IEBus	B-General_Concept
controller	O
,	O
256K	O
bytes	O
Flash	O
ROM	O
,	O
and	O
10K	O
bytes	O
RAM	O
.	O
</s>
<s>
is	O
a	O
long	O
running	O
32-bit	O
microcontroller	B-Architecture
employs	O
IEBus	B-General_Concept
controller	O
with	O
the	O
1st	O
generation	O
V850	B-Device
CPU	O
core	O
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
is	O
simplified	O
from	O
previous	O
ones	O
.	O
</s>
<s>
In	O
addition	O
,	O
starter	O
motor	O
mask	O
time	O
and	O
electrical	O
current	O
amplitude	B-Application
is	O
well	O
balanced	O
.	O
</s>
<s>
are	O
2nd	O
generation	O
V850	B-Device
(	O
E1	O
core	O
)	O
32-bit	O
microcontrollers	B-Architecture
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
is	O
simplified	O
,	O
but	O
supports	O
both	O
mode	O
1	O
and	O
mode	O
2	O
,	O
not	O
for	O
mode	O
0	O
.	O
</s>
<s>
As	O
for	O
automotive	O
network	O
,	O
these	O
are	O
equipped	O
with	O
IEBus	B-General_Concept
and	O
CAN	B-Protocol
(	O
Controller	B-Protocol
Area	I-Protocol
Network	I-Protocol
)	O
controllers	O
.	O
</s>
<s>
V850ES/SG3	O
and	O
V850ES/SJ3	O
are	O
3rd	O
generation	O
V850	B-Device
(	O
ES	O
core	O
)	O
32-bit	O
microcontrollers	B-Architecture
those	O
contain	O
IEBus	B-General_Concept
controller	O
.	O
</s>
<s>
are	O
3rd	O
generation	O
V850	B-Device
(	O
ES	O
core	O
)	O
32-bit	O
microcontrollers	B-Architecture
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
is	O
simplified	O
,	O
but	O
supports	O
both	O
mode	O
1	O
and	O
mode	O
2	O
,	O
not	O
for	O
mode	O
0	O
.	O
</s>
<s>
As	O
for	O
automotive	O
network	O
,	O
these	O
are	O
equipped	O
with	O
IEBus	B-General_Concept
and	O
CAN	B-Protocol
(	O
Controller	B-Protocol
Area	I-Protocol
Network	I-Protocol
)	O
controllers	O
.	O
</s>
<s>
are	O
5th	O
generation	O
V850	B-Device
(	O
E2v3	O
core	O
)	O
32-bit	O
microcontrollers	B-Architecture
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
is	O
simplified	O
,	O
but	O
supports	O
mode	O
1	O
and	O
2	O
with	O
32-byte	O
buffers	O
both	O
for	O
transmission	O
and	O
for	O
reception	O
.	O
</s>
<s>
As	O
for	O
automotive	O
audio	O
network	O
,	O
these	O
are	O
equipped	O
with	O
IEBus	B-General_Concept
,	O
CAN	B-Protocol
(	O
Controller	B-Protocol
Area	I-Protocol
Network	I-Protocol
)	O
,	O
LIN	O
,	O
PCM	B-Algorithm
interface	O
,	O
MediaLB	O
,	O
</s>
<s>
F2MC-16LX	O
16-bit	O
microcontroller	B-Architecture
of	O
Cypress	O
Semiconductor	O
(	O
formerly	O
Fujitsu	O
Microelectronics	O
)	O
has	O
IEBus	B-General_Concept
controller	O
.	O
</s>
<s>
It	O
supports	O
full	O
feature	O
of	O
IEBus	B-General_Concept
mode	O
0	O
,	O
1	O
,	O
and	O
2	O
,	O
with	O
8-byte	O
FIFO	O
both	O
for	O
transmission	O
and	O
reception	O
.	O
</s>
<s>
is	O
a	O
16-bit	O
microcontroller	B-Architecture
with	O
M16C/60	O
Series	O
CPU	O
Core	O
.	O
</s>
<s>
UART2	O
can	B-Protocol
be	O
used	O
for	O
IEBus	B-General_Concept
controller	O
as	O
special	O
mode	O
3	O
(	O
IE	O
mode	O
)	O
.	O
</s>
<s>
is	O
a	O
long	O
running	O
microcontroller	B-Architecture
comprised	O
internal	O
32-bit	O
configuration	O
H8S/2000	O
CPU	O
core	O
with	O
16-bit	O
external	O
bus	O
controller	O
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
supports	O
mode	O
0	O
,	O
1	O
,	O
and	O
2	O
with	O
1	O
byte	O
data	O
buffer	O
both	O
for	O
transfer	O
and	O
reception	O
.	O
</s>
<s>
is	O
a	O
recent	O
32-bit	O
microcontroller	B-Architecture
.	O
</s>
<s>
Its	O
IEBus	B-General_Concept
controller	O
supports	O
mode	O
0	O
,	O
and	O
1	O
(	O
not	O
2	O
)	O
.	O
</s>
