mc33662 Freescale Semiconductor, Inc, mc33662 Datasheet - Page 26

• Manufacturer Part Number: mc33662
• Description: Lin 2.1 / Saej2602-2, Lin Physical Layer
• Manufacturer: Freescale Semiconductor, Inc

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
transition. This is illustrated in
wake-up is detected (during the dominant to recessive
transition), the device enters into Awake mode, with INH
HIGH and RXD pulled LOW.
or 5.0 V (depending on the system) to enter into Normal
mode. Once in Normal mode, the device has to wait t
delay before transmitting the first dominant bit.
Wake-up from EN pin
of the EN pin. When EN is switched from LOW to HIGH and
stays HIGH for a delay higher than t
awakened and enters into Normal mode. See
FAIL-SAFE FEATURES
26
33662
BLOCK
Supply
Power
Once in the Awake mode, the EN pin has to be set to 3.3 V
The device can be waked-up by a LOW to HIGH transition
The table below describes the 33662 protections.
INH
LIN
V
TXD Pin Permanent
SUP
Power on Reset
INH Thermal
LIN Thermal
Shutdown
Shutdown
Dominant
under-voltage
FAULT
(POR)
FUNCTIONAL
Preparation to
Normal mode
Sleep modes
All modes
Figure 16
Awake &
Normal,
Normal
MODE
LWUE
and 19. Once the
, the device is
TXD pin low for more
V
than 5.0 ms (typ)
SUP
Temperature >
Temperature >
then power up
Figure 14
CONDITION
V
160 °C (typ)
160 °C (typ)
SUP
< 3.5 V (min)
< V
first_dom
UVL
and
INH high side turned
receiver in recessive
INH high side turned
No internal supplies
LIN transmitter and
off. LIN transmitter
LIN transmitter in
LIN transmitter in
and receiver in
recessive state
recessive state
recessive state
17. Once in Normal mode, the device has to wait t
delay before transmitting the first dominant bit.
Wake-up from WAKE Pin (Awake Transitional Mode)
is stored. A change in the level longer than the deglitcher time
(70 µs maximum) will generate a wake-up, and the device
enters into the Awake Transitional mode, with INH HIGH and
RXD pulled LOW. See
into Normal mode when EN is switched from LOW to HIGH
and stays HIGH for a delay higher than t
Normal mode, the device has to wait t
transmitting the first dominant bit.
RESPONSE
Just before entering the Sleep mode, the WAKE pin state
state
off
Condition gone
Condition gone
Condition gone
Condition gone
Condition gone
RECOVERY
CONDITION
Analog Integrated Circuit Device Data
Figure 15
and 18. The device goes
Freescale Semiconductor
FUNCTIONALITY MODE
FIRST_DOM
Device returns in same
Device returns in same
Device returns in same
Device returns in same
Device goes in Awake
previous device mode
mode whatever the
LWUE
functional mode
functional mode
functional mode
functional mode
RECOVERY
. Once in
delay before
FIRST_DOM