MC33662LEF Datasheet, PDF (26/31 Pages) Freescale Semiconductor, Inc – LIN 2.1 / SAEJ2602-2, LIN Physical Layer

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Power Up
V_SUP > V_POR
Awake
LIN bus dominant pulse
for t > t_WUF(31)
or
WAKE pin state
changes for t > t_WF(32)
EN HIGH to LOW for t > t_LWUE
EN LOW to HIGH for t > t_LWUE
Toggle
Function⁽³³⁾
Fast Baud
Rate (10x)
Internal WAKE⁽³⁰⁾ state
changes during t_SD
EN HIGH to LOW
Preparation ^{for t > tLWUE}
to Sleep _{EN LOW to HIGH}
Internal WAKE⁽³⁰⁾ state
doesn’t change during t_SD
for t > t_LWUE
Normal Baud Rate for
33662L and 33662S
or
Slow Baud Rate
for 33662J
Toggle
Function⁽³³⁾
Sleep
EN LOW to HIGH for t > t_LWUE
Notes
32. Internal WAKE is the WAKE signal filtered by t_WF (WAKE deglitcher)
33. See Figure 15 and Figure 18
34. See figures Figure 14 and Figure 17
35. The Toggle Function is guaranteed at ambient and hot temperature
Figure 29. Operational and Transitional Modes State Diagram
Table 7. Explanation of Operational and Transitional Modes State Diagram
Operational/
Transitional
LIN
Sleep
Recessive state, driver off with
725 k pull-up
Awake
Recessive state, driver off. 
725 k pull-up active
INH
OFF
(low)
ON
(high)
Preparation to ^{Recessive state, driver off with ï€} 
Sleep mode ^{725 k pull-up}
ON
(high)
Normal mode
Driver active. 30 k pull-up active ON
Normal Baud Rate for 33662L
and 33662S
(high)
Slow Baud Rate for 33662J
Fast Baud Rate (> 100 kbps) for
33662L, 33662S, & 33662J
X = Don’t care.
EN
LOW
LOW
LOW
HIGH
TXD
RXD
X
High-impedance.⁽³⁶⁾
HIGH if external pull-up to V_DD
X
LOW.
If external pull-up, HIGH-to-LOW
transition reports wake-up
X
High-impedance. HIGH if
external pull-up to V_DD
LOW to drive LIN bus in dominant Report LIN bus state:
HIGH to drive LIN bus in recessive ^{• Low LIN bus dominantï€} 
• High LIN bus recessive
Notes
36. Only applies to 33662B. The 33662 will have a leakage current of typically 95 A if a pull-up resistor is implemented.
COMPATIBILITY WITH LIN1.3
Following the Consortium LIN specification Package,
Revision 2.1, November 24, 2006, Chapter 1.1.7.1
Compatibility with LIN1.3, page 15.
The LIN 2.1 physical layer and is backward compatible
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.
33662
26
Analog Integrated Circuit Device Data
Freescale Semiconductor