ATA6612C View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
ATA6612C
Atmel Corporation
'ATA6612C' PDF : 312 Pages View PDF
3.3.20.5 Unpowered Mode
If you connect battery voltage to the application circuit, the voltage at the VS pin increases according to the block capacitor
(see Figure 3-7 on page 17). After VS is higher than the VS undervoltage threshold VSth, the IC mode changes from
unpowered mode to fail-safe mode. The VCC output voltage reaches its nominal value after tVCC. This time, tVCC, depends
on the VCC capacitor and the load.
The NRES is low for the reset time delay treset. During this time, treset, no mode change is possible.
Figure 3-6. LIN Wake-up from Sleep Mode
Bus wake-up filtering time
tbus
Fail-safe Mode
Normal Mode
LIN Bus
RXD
Low
TXD
VCC
Voltage
Regulator
EN
NRES
Watchdog
Off state
Watchdog off
On state
Regulator wake-up time
Reset
time
EN High
Microcontroller
start-up time delay
Start watchdog lead time td
3.3.21 Wake-up Scenarios from Silent to Sleep Mode
3.3.21.1 Remote Wake-up via Dominant Bus State
A voltage lower than the LIN pre_wake detection VLINL at the LIN pin activates the internal LIN receiver.
A falling edge at the LIN pin followed by a dominant bus level VBUSdom maintained for a certain time period (> tBUS) and
followed by a rising edge at pin LIN result in a remote wake-up request. The device switches from silent or sleep mode to
fail-safe mode. The VCC voltage regulator is/remains activated, the INH pin is switched to high, and remote wake-up request
is indicated by a low level at the RXD pin to generate an interrupt for the microcontroller. A low level at the LIN pin in the
normal mode starts the bus wake-up filtering time, and if the IC is switched to silent or sleep mode, it will receive a wake-up
after a positive edge at the LIN pin.
ATA6612C/ATA6613C [DATASHEET]
15
9111L–AUTO–11/14
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