L9638 データシートの表示（PDF） - STMicroelectronics
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L9638 Datasheet PDF : 14 Pages
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L9638
Figure 6. State Diagram
NORMAL
TxD RxD WUP LIN EN INH
TX 0
mode 1
RX 1
mode 1
0 float 0
1 float 1
0 float 0
1 float 1
1 Vs
1 Vs
1 Vs
1 Vs
EN
Power-up
EN
(with LIN=0)
if t(EN=0 after -1>0)>tgts
EN
(with LIN=1)
if t(EN=0 after -1>0)>tgts
and no wake up event
SHORT CIRCUIT
TxD RxD WUP LIN EN INH
HiZ HiZ X 0 0 0
if (LIN=1)
SLEEP
TxD RxD WUP LIN EN INH
HiZ HiZ X 1 0 0
X
HiZ
float
don’t care, input signal is stable high or low
internal pull up is switched off;
TxD input signal may be high or low or transitioning
RxD output signal is high impedance.
input signal may be high or low or transitioning
STANDBY
TxD RxD WUP LIN EN INH
float 0 float 0 0 Vs
float 1 float 1 0 Vs
EN
if t(EN=1 after -0>1)>tENgs
LIN
if t(LIN=0 after -1>0)>tLINgs
WUP
WUP
tdelay=t WUPgs
10/14
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