Figure 3-2. LIN Wake-up Waveform Diagram
LIN bus
ATA6661
INH
Low or floating
High
RXD
External
voltage
regulator
EN
High or floating
Low
Bus wake-up filtering time
tBus
Off state
On state
Regulator wake-up time delay
Node in sleep state
Node in
Operation
EN High
Microcontroller start-up time delay
Figure 3-3. LIN Wake-up from Wake-up Switch
Wake pin
State change
INH
Low or floating
High
RXD
TXD
Voltage
regulator
EN
High or floating
Low
High
TXD weak pull-down resistor
Wake filtering
time tWAKE
Off state
TXD strong pull-down
On state
Regulator wake-up time delay
Node in sleep state
weak
pull-down
Node in
Operation
EN High
Microcontroller start-up time delay
7
4729M–AUTO–02/09