ATA6624 ATMEL Corporation, ATA6624 Datasheet - Page 6

• Manufacturer Part Number: ATA6624
• Description: Ata6624
• Manufacturer: ATMEL Corporation

3.13
3.14
3.15
3.16
3.17
3.18
3.19
6
TM Input Pin
KL_15 Pin
INH Output Pin
Reset Output Pin (NRES)
WD_OSC Output Pin
NTRIG Input Pin
Wake-up Events from Sleep or Silent Mode
ATA6622/ATA6624/ATA6626
The TM pin is used for final production measurements at Atmel
be always connected to GND.
The KL_15 pin is a high-voltage input used to wake up the device from Sleep or Silent Mode. It
is an edge sensitive pin (low-to-high transition). It is usually connected to ignition to generate a
local wake-up in the application when the ignition is switched on. Although KL_15 pin is high
voltage (V
directly to GND if you do not need it. A debounce timer with a typical Tdb
implemented.
The input voltage threshold can be adjusted by varying the external resistor due to the input cur-
rent I
capacitor of 100 nF are recommended. With this RC combination you can increase the wake-up
time Tw
You can also increase the wake-up time using external capacitors with higher values.
The INH Output pin is used to switch an external voltage regulator on during Normal or Fail-safe
Mode. The INH pin is switched off in Sleep or Silent Mode. It is possible to switch off the external
1 k master resistor via the INH pin for master node applications.
The Reset Output pin, an open drain output, switches to low during V
watchdog failure.
The WD_OSC Output pin provides a typical voltage of 1.2V, which supplies an external resistor
with values between 34 k and 120 k to adjust the watchdog oscillator time.
The NTRIG Input pin is the trigger input for the window watchdog. A pull-up resistor is imple-
mented. A negative edge triggers the watchdog. The trigger signal (low) must exceed a
minimum time t
• LIN-bus
• WAKE pin
• EN pin
• KL_15
KL_15
KL_15
. To protect this pin against voltage transients, a serial resistor of 50 k and a ceramic
Batt
and, therefore, the sensitivity against transients on the ignition Kl.30.
), it is possible to switch the IC into Sleep or Silent Mode. Connect the KL_15 pin
trigmin
to generate a watchdog trigger.
®
. In normal application, it has to
CC
undervoltage or a
Kl_15
4986E–AUTO–02/08
of 160 µs is