ata6616 ATMEL Corporation, ata6616 Datasheet - Page 10

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

3.4.2
10
ATA6616/ATA6617 [Preliminary]
Silent Mode
A falling edge at EN when TXD is high switches the IC into Silent Mode. The TXD Signal has to
be logic high during the Mode Select window (see
path is disabled in Silent Mode. The overall supply current from V
I
The regulator with 2% tolerance can source up to 50 mA. The internal slave termination between
the LIN pin and the VS pin is disabled in Silent Mode, only a weak pull-up current
(typically 10 µA) between the LIN pin and the VS pin is present. Silent Mode can be activated
independently from the actual level on the LIN, WAKE, or KL_15 pins. If an undervoltage condi-
tion occurs, NRES is switched to low, and the IC changes its state to Fail-safe Mode.
With EN high, you can switch directly from Silent mode to Normal mode.
A voltage less than the LIN Pre_Wake detection VLINL at the LIN pin activates the internal LIN
receiver and switches on the internal slave termination between the LIN pin and the VS pin.
Figure 3-3.
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
remote wake-up request. The device switches from Silent Mode to Fail-safe Mode. The internal
LIN slave termination resistor is switched off. The remote wake-up request is indicated by a low
level at the RXD pin to interrupt the microcontroller (see
used to switch directly to Normal Mode.
VSsi
= 57 µA plus the VCC regulator output current I
bus
NRES
VCC
TXD
) and the following rising edge at the LIN pin (see
LIN
EN
Normal Mode
Switch to Silent Mode
LIN switches directly to recessive mode
t
d
_silent = maximum 20 µs
Delay time silent mode
t
d
= 3.2 µs
Mode select window
DRAFT
VCC
Figure 3-3 on page
.
Figure 3-4 on page
Figure 3-4 on page
Silent Mode
Batt
is a combination of the
10). The transmission
11). EN high can be
11) results in a
9132A–AUTO–10/08