MC33663ALEF Freescale Semiconductor, MC33663ALEF Datasheet - Page 28

• Manufacturer Part Number: MC33663ALEF
• Description: LIN Transceivers dual LINcell
• Manufacturer: Freescale Semiconductor

Specifications of MC33663ALEF

• Rohs: yes
• Operating Supply Voltage: 7 V to 18 V
• Supply Current: 22 uA
• Maximum Operating Temperature: + 125 C
• Package / Case: SOIC-14
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

there are two transitional modes: Awake mode which allows the device to go into Normal mode, and Preparation to Sleep mode
which allows the device to go into Sleep mode.
NORMAL OR SLOW BAUD RATE
specification 1.3, 2.0, 2.1, and 2.2.
FAST BAUD RATE
(> 100 kbps) -- for example, electronic control unit (ECU) tests and microcontroller program download. The bus pull-up resistor
might be adjusted to ensure a correct RC time constant in line with the high baud rate used.
described in
1 back into normal baud rate.
RXD1 pin goes at low level for t
stays high. Both sequences are illustrated in
PREPARATION TO SLEEP MODE
1.
SLEEP MODE
example.
or Low) during this delay. The LIN Module 1 conditions to not enter Sleep mode, but enter Awake mode are detailed in the
Preparation into Sleep Mode chapter. See
28
33663
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
1. EN1 pin set LOW while TXD1 is HIGH
2. TXD1 stays HIGH for 12.5 µs min
3. TXD1 set LOW for 12.5 µs min
4. TXD1 pulled HIGH for 12.5 µs min
5. EN1 pin set LOW to HIGH while TXD1 still HIGH
As described by the following, the 33663L, 33663J, and 33663S have two operational modes, Normal and Sleep. In addition,
In the Normal mode, the LIN bus can transmit and receive information.
The 33663L and 33663S (20 kbps) have a slew rate and timing compatible with Normal Baud Rate and LIN protocol
The 33663J (10 kbps) has a slew rate and timing compatible with Low Baud Rate.
From Normal mode, the three devices can enter into Fast Baud Rate (Toggle function).
In fast baud rate, the slew rate is around 10 times faster than the normal baud rate. This allows very fast data transmission
The following sequence is applicable to both LIN Modules independently.
Fast baud rate is entered via a special sequence (called toggle function) as follows:
The LIN Module enters into the fast baud rate if the delay between step 1 to step 5 is 45 µs maximum. The toggle function is
Fast baud rate selection is reported to the MCU by the RXD1 pin. Once the LIN Module 1 enters in this fast baud rate, the
The following sequence is applicable to both LIN Modules simultaneously or separately. Here it is detailed with the LIN Module
To enter the Preparation to Sleep mode, EN1 must be low for a delay higher than t
• If the WAKE1 pin state doesn’t change during t
• If the WAKE1 pin state changes during t
• If the WAKE1 pin state changes during t
• If the WAKE1 pin state changes before t
• If EN1 goes high for a delay higher than t
The following Sleep mode paragraph is applicable to both LIN Modules simultaneously or separately. LIN Module 1 is an
To enter into Sleep mode, EN1 must be low for a delay longer than t
mode after the end of t
into Awake Mode.
Figures
19. Once in fast baud rate, the same toggle function just described previously is used to bring the LIN Module
SD
timing.
5
. When LIN Module 1 returns to normal baud rate with the same toggle function, the RXD1 pin
FUNCTIONAL DEVICE OPERATION
Figure
Figures 19
SD
SD
SD
LWUE
and t
and the delay t
and if t
OPERATIONAL MODES
23.
, the LIN Module 1 returns in Normal mode.
SD
WF
and t
WF
and 20.
delay has been reached before end of t
is reached after end of t
LWUE
WF
, then the LIN Module 1 goes in Sleep Mode.
ends during t
SD
and the WAKE1 pin must stay in the same state (High
SD
, then the LIN Module 1 goes in Awake Mode.
SD
, then the LIN Module 1 goes into Sleep
LWUE
Analog Integrated Circuit Device Data
.
SD
, then the LIN Module 1 goes
Freescale Semiconductor