ATA6625-EK Atmel, ATA6625-EK Datasheet - Page 9

• Manufacturer Part Number: ATA6625-EK
• Description: BOARD DEMO LIN SBC FOR ATA6625
• Manufacturer: Atmel

Specifications of ATA6625-EK

• Main Purpose: Interface, LIN
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6625
• Primary Attributes: LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator
• Secondary Attributes: 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 8-SOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4.4
4.5
4957I–AUTO–03/11
Fail-safe Mode
Unpowered Mode
Figure 4-5.
At system power-up the device automatically switches to Fail-safe Mode. The voltage regula-
tor is switched on (see
and gives a reset to the microcontroller. LIN communication is switched off. The IC stays in
this mode until EN is switched to high, and changes then to the Normal Mode. A power down
of V
power up. A logic low at NRES switches the IC into Fail-safe Mode directly.
If you connect battery voltage to the application circuit, the voltage at the VS pin increases
according to the block capacitor (see
undervoltage threshold VS
The VCC output voltage reaches its nominal value after t
VCC capacitor and the load.
NRES is low for the reset time delay t
regulator
Batt
LIN bus
voltage
NRES
RXD
VCC
(V
EN
S
< 3.7V) during Silent- or Sleep Mode switches the IC into the Fail-safe Mode after
LIN Wake-up Diagram from Sleep Mode
Bus wake-up filtering time
Figure 6-1 on page
th
Low
Low
t
bus
, the IC mode changes from Unpowered Mode to Fail-safe Mode.
Off state
Reset
Figure 6-1 on page
; no mode change is possible during this time.
11). The NRES output switches to low for t
Atmel ATA6623/ATA6625
Reset
time
Regulator wake-up time
Fail-safe Mode
VCC
11). After VS is higher than the VS
start-up time delay
Low
On state
Microcontroller
. This time, t
VCC
, depends on the
EN High
Normal Mode
res
= 4ms
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