Rainbow Electronics ATA6630 User Manual
Page 12
12
9117C–AUTO–10/09
ATA6628/ATA6630 [Preliminary]
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
bus
) and a rising edge at pin LIN result in a remote wake-up request. The device
switches from Sleep Mode to Fail-safe Mode.
The VCC regulator is activated, and the internal LIN slave termination resistor is switched on.
The remote wake-up request is indicated by a low level at the RXD pin to interrupt the microcon-
troller (see
EN high can be used to switch directly from Sleep/Silent to Fail-safe Mode. If EN is still high after
VCC ramp up and undervoltage reset time, the IC switches to the Normal Mode.
Figure 4-5.
LIN Wake Up from Sleep Mode
Reg
u
l
a
tor w
a
ke-
u
p time
Off
s
t
a
te
On
s
t
a
te
Low
Fail-
s
afe Mode
Normal Mode
EN High
Microcontroller
Re
s
et
time
Low or flo
a
ting
Flo
a
ting
W
a
tchdog
NRE
S
EN
VCC
volt
a
ge
reg
u
l
a
tor
RXD
LIN
bus
B
us
w
a
ke-
u
p filtering time
t
bus
TXD
W
a
tchdog off
S
t
a
rt w
a
tchdog le
a
d time t
d
s
t
a
rt-
u
p time del
a
y