ATA6617-P3QW Atmel, ATA6617-P3QW Datasheet - Page 12

• Manufacturer Part Number: ATA6617-P3QW
• Description: MCU W/LIN TX/5V REG/WTCDG 38VQFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6617-P3QW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.4.4
3.4.5
12
Atmel ATA6616/ATA6617
Fail-safe Mode
Unpowered Mode
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
device switches from Sleep Mode to Fail-safe Mode.
The VCC regulator is activated, and the remote wake-up request is indicated by a low level at
the RXD pin to interrupt the microcontroller (see
Figure 3-5.
The device automatically switches to Fail-safe Mode at system power up and the voltage reg-
ulator is switched on (see
t
stays in this mode until EN is switched to high. The IC then changes to Normal Mode. A power
down of V
at NRES switches into Fail-safe Mode directly. During Fail-safe Mode the TXD pin is an output
and signals the last wake-up source.
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.
The NRES is low for the reset time delay t
possible.
res
= 4ms and gives a reset to the microcontroller. LIN communication is switched off. The IC
NRES
bus
VCC
TXD
Batt
LIN
EN
) and a following rising edge at pin LIN results in a remote wake-up request. The
Normal Mode
(V
Switch to Sleep Mode
S
< 4V) during Silent or Sleep Mode switches the IC into Fail-safe Mode. A low
th
, the IC mode changes from Unpowered Mode to Fail-safe Mode.
Figure 3-7 on page
LIN switches directly to recessive mode
t
d_sleep
Delay time sleep mode
t
d
= 3.2µs
Figure 3-7 on page
Mode select window
= maximum 20µs
reset
. During this time, t
Figure 3-6 on page
16).The NRES output switches to low for
VCC
16). After VS is higher than the VS
. This time, t
Sleep Mode
13).
reset
, no mode change is
VCC
, depends on the
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