ATA6628 Ver la hoja de datos (PDF) - Atmel Corporation

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ATA6628

LIN Bus Transceiver with 3.3V (5V) Regulator and Watchdog

Atmel Corporation 

3.17

WD_OSC Output Pin

The WD_OSC Output pin provides a typical voltage of 1.2V, which supplies an external resistor with values between 34kΩ

and 120kΩ to adjust the watchdog oscillator time.

If the watchdog is disabled, this voltage is switched off and you can either tie to GND or leave this pin open.

3.18

3.19

NTRIG Input Pin

The NTRIG Input pin is the trigger input for the window watchdog. A pull-up resistor is implemented. A negative edge

followed by a low phase longer than ttrigmin triggers the watchdog.

Wake-up Events from Sleep or Silent Mode

● LIN-bus

● WAKE pin

● EN pin

● KL_15

3.20

DIV_ON Input Pin

The DIV_ON pin is a low voltage input. It is used to switch on or off the internal voltage divider PV output directly with no time

limitation (see Table 3-1 on page 6). It is switched on if DIV_ON is high or it is switched off if DIV_ON is low. In Sleep Mode

the DIV_ON functionality is disabled and PV is off. An internal pull-down resistor is implemented.

3.21

VBATT Input Pin

The VBATT is a high voltage input pin to supply the internal voltage divider. In an application with battery voltage monitoring,

this pin is connected to VBattery via a 47Ω resistor in series and a 10nF capacitor to GND (see Figure 9-2 on page 31). The

divider ratio is 1:6.

3.22

PV Output Pin

For applications with battery monitoring, this pin is directly connected to the ADC of a microcontroller. For buffering the ADC

input an external capacitor might be needed. This pin guarantees a voltage and temperature stable output of a VBattery ratio.

The PV output pin is controlled by the DIV_ON input pin.

Table 3-1.

Table of Voltage Divider

Mode of Operation

Fail-safe/Normal/

High-speed/Silent

Sleep

Input DiV_ON

0

1

0

1

Voltage Divider Output PV

Off

On

Off

Off

3.23

SP_MODE Input Pin

The SP_MODE pin is a low-voltage input. High-speed Mode of the transceiver can be activated via a high level during

Normal Mode. Return to LIN 2.x Transceiver Mode with slope control is possible if you switch the SP_MODE pin to low.

6

ATA6628/ATA6630 [DATASHEET]

9117I–AUTO–10/14

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