ATA6823 ATMEL Corporation, ATA6823 Datasheet - Page 7

• Manufacturer Part Number: ATA6823
• Description: H-bridge Motor Driver
• Manufacturer: ATMEL Corporation

4856E–AUTO–07/07
Pulling the EN2 pin up to the V
a time constant of 20 µs, based on a 100 kHz clock.
The second possibility for wake-up can be performed using the LIN transceiver. In Sleep mode,
the LIN receiver is partially active.
The wake-up by LIN requires 2 steps:
If the change to Active mode was caused by LIN, the EN1 or EN2 pins may remain LOW without
disturbing the Active mode.
The input EN1 is intended to keep the IC in Active Mode via a signal from the microcontroller.
The input is ESD-protected by diodes against GND and VCC. Therefore, the input voltage must
be positive and not higher than V
the VCC regulator is off in the Sleep mode and V
A HIGH to LOW transition at pin EN1 and a following permanent LOW for the time t
(typically 20 µs) switches the IC to Sleep mode.
Figure 5-1
vated receive block of the LIN interface. After going to Active mode, the V
working.
Go to Sleep is possible with a valid HIGH to LOW transition at pin EN1 (permanent LOW for
longer than t
• Go to Active using the LIN interface
1. If the voltage on pin LIN is below a value of V
2. If LIN = LOW during a filter time t
• Stay in Active via EN1
• Go to Sleep
of the LIN interface is active (not to be confused with Active mode of the whole IC). The
active receive part is able to detect a valid LOW on the LIN pin.
mode. A short change back to HIGH during the filter time will reset the filter. This infor-
mation is stored in a latch after entering Active mode
illustrates the wake-up by LIN. The status PREWAKE is characterized by the acti-
db
) if EN1 was in a valid HIGH state (HIGH for longer than t
BAT
CC
level will drive the IC into Active mode. EN2 is debounced with
. EN1 cannot be used to switch from Sleep to Active because
wakeLIN
(typically 70 µs) the IC will change to Active
CC
/DATwake
will be zero.
ATA6823 [Preliminary]
(about V
VBAT
– 2V) the receive part
db
) before.
CC
regulator starts
gotosleep
7