mc33662 Freescale Semiconductor, Inc, mc33662 Datasheet - Page 27

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

Table 7. Explanation of Operational and Transitional Modes State Diagram
COMPATIBILITY WITH LIN1.3
Revision 2.1, November 24, 2006, Chapter 1.1.7.1
Compatibility with LIN1.3, page 15.
Analog Integrated Circuit Device Data
Freescale Semiconductor
X = Don’t care.
Preparation to
Normal mode
Operational/
Transitional
Sleep mode
LIN bus dominant pulse
Notes
changes for t > t
Following the Consortium LIN specification Package,
30.
31.
32.
33.
Awake
Sleep
WAKE pin state
for t > t
Internal WAKE is the WAKE signal filtered by t
See
See figures
The Toggle Function is guaranteed at ambient and hot temperature
V
or
WUF
SUP
Figure 15
Recessive state, driver off with
725 kΩ pull-up
Recessive state, driver off.
725 kΩ pull-up active
Recessive state, driver off with
725 kΩ pull-up
Driver active. 30 kΩ pull-up active
Normal Baud Rate for 33662L
and 33662S
Slow Baud Rate for 33662J
Fast Baud Rate (> 100 kbps) for
33662L, 33662S, & 33662J
(31)
> V
WF
Power Up
POR
(32)
Figure 14
Awake
Sleep
and
Figure 18
LIN
and
doesn’t change during t
Figure 29. Operational and Transitional Modes State Diagram
EN LOW to HIGH for t > t
Internal WAKE
Figure 17
Internal WAKE
changes during t
(30)
(30)
(high)
(high)
(high)
(low)
OFF
INH
ON
ON
ON
state
state
SD
WF
SD
(WAKE deglitcher)
LWUE
Preparation
HIGH
LOW
LOW
LOW
to Sleep
EN
LOW to drive LIN bus in dominant
HIGH to drive LIN bus in recessive
EN HIGH to LOW for t > t
EN LOW to HIGH for t > t
EN HIGH to LOW
with the LIN 1.3 physical layer, but not the other way around.
The LIN 2.1 physical layer sets harder requirements, i.e. a
node using the LIN 2.1 physical layer can operate in a LIN 1.3
cluster.
EN LOW to HIGH
for t > t
for t > t
The LIN 2.1 physical layer and is backward compatible
LWUE
LWUE
TXD
X
X
X
LWUE
Normal Baud Rate for
LWUE
33662L and 33662S
Slow Baud Rate
for 33662J
FUNCTIONAL DEVICE OPERATION
High-impedance. HIGH if
external pull-up to V
LOW.
If external pull-up, HIGH-to-LOW
transition reports wake-up
High-impedance. HIGH if
external pull-up to V
Report LIN bus state:
• Low LIN bus dominant
• High LIN bus recessive
or
Function
Toggle
OPERATIONAL MODES
(33)
RXD
Function
Rate (10x)
Fast Baud
Toggle
DD
DD
(33)
33662
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