Rainbow Electronics ATA6631 User Manual
Page 7
7
9165A–AUTO–11/09
ATA6629/ATA6631
A voltage less than the LIN Pre-wake detection V
LINL
at pin LIN activates the internal LIN
receiver and starts the wake-up detection timer.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
bus
) and the following rising edge at pin LIN (see
remote wake-up request. The device switches from Silent Mode to Fail-safe Mode, then the
internal LIN slave termination resistor is switched on. The remote wake-up request is indicated
by a low level at pin RXD and TXD to interrupt the microcontroller (
). EN
high can be used to switch directly to Normal Mode.
Figure 4-3.
LIN Wake-up Waveform Diagram from Silent Mode
Undervolt
a
ge detection
a
ctive
S
ilent mode
3
.
3
V/5V/50 mA
F
a
il-
sa
fe mode
3
.
3
V/5V/50 mA
Norm
a
l mode
Low
F
a
il-
sa
fe mode
Norm
a
l mode
EN High
High
NRE
S
EN
VCC
RXD
LIN
bus
B
us
w
a
ke-
u
p filtering time
t
bus
High
TXD
High