ata6616 ATMEL Corporation, ata6616 Datasheet - Page 8

• Manufacturer Part Number: ata6616
• Description: Microcontroller With Lin Transceiver, 5v Regulator And Watchdog
• Manufacturer: ATMEL Corporation

3.3.14
3.3.15
3.3.16
3.3.17
3.3.18
3.3.19
8
ATA6616/ATA6617 [Preliminary]
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
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 at 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 INH pin is switched off
during VCC undervoltage reset.
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 47 k and a ceramic
Batt
and, therefore, the sensitivity against transients on the ignition Kl.15.
), it is possible to switch the IC into Sleep or Silent Mode. Connect the KL_15 pin
trigmin
to generate a watchdog trigger.
DRAFT
CC
undervoltage or a
Kl_15
9132A–AUTO–10/08
of 160 µs is