ATA6613-EK Atmel, ATA6613-EK Datasheet - Page 16

• Manufacturer Part Number: ATA6613-EK
• Description: BOARD DEMO LIN-MCM FOR ATA6613
• Manufacturer: Atmel

Specifications of ATA6613-EK

• Main Purpose: Interface, LIN + MCU
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6613
• Primary Attributes: LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
• Secondary Attributes: 16 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.3.22
3.3.23
16
Atmel ATA6612/ATA6613
Fail-safe Features
Voltage Regulator
The voltage regulator needs an external capacitor for compensation and for smoothing the
disturbances from the microcontroller. It is recommended to use an electrolythic capacitor with
C > 1.8µF and a ceramic capacitor with C = 100nF. The values of these capacitors can be var-
ied by the customer, depending on the application.
The main power dissipation of the IC is created from the VCC output current I
needed for the application. In
ATA6612/ATA6613 is shown.
• During a short-circuit at LIN to V
• During a short-circuit from LIN to GND the IC can be switched into Sleep or Silent Mode. If
• The reverse current is very low < 15µA at the LIN pin during loss of V
• During a short circuit at VCC, the output limits the output current to I
• EN pin provides a pull-down resistor to force the transceiver into recessive mode if EN is
• RXD pin is set floating if V
• TXD pin provides a pull-up resistor to force the transceiver into recessive mode if TXD is
• If TXD is short-circuited to GND, it is possible to switch to Sleep Mode via ENABLE after
• If the WD_OSC pin has a short-circuit to GND or the resistor is disconnected, the watchdog
the power dissipation, the chip temperature exceeds T
off. The chip cools down and after a hysteresis of T
stays on high because LIN is high. During LIN overtemperature switch-off, the VCC
regulator works independently.
the short-circuit disappears, the IC starts with a remote wake-up.
optimal behavior for bus systems where some slave nodes are supplied from battery or
ignition.
undervoltage, NRES switches to low and sends a reset to the microcontroller. The IC
switches into Fail-safe Mode. If the chip temperature exceeds the value T
output switches off. The chip cools down and after a hysteresis of T
on again. Because of the Fail-safe Mode, the VCC voltage will switch on again although EN
is switched off from the microcontroller. The microcontroller can start with its normal
operation.
disconnected.
disconnected.
t
runs with an internal oscillator and guarantees a reset after the second NTRIG signal at the
latest.
dom
> 20ms.
Batt
Figure 3-8 on page 17
is disconnected.
Battery
, the output limits the output current to I
hys
the safe operating area of the Atmel
, switches the output on again. RXD
LINoff
, and the LIN output is switched
hys
VCCn
Batt
, switches the output
. Because of
or GND. This is
VCCoff
BUS_LIM
9111H–AUTO–01/11
VCC
, the VCC
, which is
. Due to
®