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參數(shù)資料
| 型號(hào)： | TH8082 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Single LIN Bus Transceiver |
| 中文描述： | 單LIN總線收發(fā)器 |
| 文件頁(yè)數(shù)： | 3/14頁(yè) |
| 文件大?。?/td> | 175K |
| 代理商： | TH8082 |
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T H8082
Single LIN Transceiver
www.melexis.com
Page 3
Data Sheet Rev 1.0 June 2001
Func tional Description
After
power on
the chip automatically enters the
V
BAT
-
stanby mode
. In this intermediate mode the INH output
will become HIGH (V
S
) and therefore the voltage regula-
tor will provide the V
CC
- supply . The transceiver will
remain the V
BAT
-stanby mode until the controller sets it to
normal operation
( EN = High ) . Only in this mode bus
communication is possible. The TH8082 switches itself in
the V
BAT
-stanby mode if V
CC
is missing or below the
threshold.
The
sleep mode
( EN = LOW) can only be reached from
normal mode and permits a very low power consumtion
because the transceiver and even the external voltage
regulator get disabled. If the V
CC
has been switched off a
wake-up request from the bus line will cause the TH8082
to enter the V
BAT
-stanby mode (V
CC
is present again) and
sets the RxD output to low until the device enters the
normal operation mode (active LOW interrupt at RxD). If
the INH pin is not connected to the regulator or the inhibi-
table external regulator is not the one that provides the
V
CC
– supply, the normal mode is directly accessilble by
a logic high on the EN pin.
In order to prevent an unintended wake-up caused by
disturbances of the automotiv environment incoming
dominant signals from the bus have to exceed the wake–
up delay time.
EN
VCC
Comment
INH
RxD
0
0
V
BAT
-standby , power on
Vs
0
0
1
V
BAT
-standby , V
CC
on , wake up condition after
power on
Vs
Active LOW
wake-up interrupt
1
1
Normal mode , V
CC
on
Vs
1 = recessive bus
0 = dominant bus
1
0
V
BAT
-standby , VCC missing (V
CC
<V
CCUV
)
Vs
V
CC
0
0
Sleep mode, switch to V
BAT
-standby in case of
wake-up request
floating
Active LOW wake-up inter-
rupt if V
CC
is present
0
1
Sleep mode, regulator not disabled, switch to
V
BAT
-standby in case wake-up request, directly
switch to normal mode with EN = 1
floating
Active LOW
wake-up interrupt
Mode Control of TH8082
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