MC33389DDW Freescale Semiconductor, MC33389DDW Datasheet - Page 22

• Manufacturer Part Number: MC33389DDW
• Description: IC SYSTEM BASE W/CAN 28-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33389DDW

• Controller Type: System Basis Chip
• Interface: CAN
• Voltage - Supply: 5.5 V ~ 18 V
• Current - Supply: 45mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CAN Transceiver Modes
RXTX mode, Term V
mode. They are controlled by the Transceiver Control/Status
Register (TCR).
• RXTX mode—Full transmitting and receiving capabilities
equivalent.
• RX Only mode—The transmitter is disabled but the
equivalent.
• Bus Stand-by mode—Is the Low Power mode for the CAN
Low Power Modes
exited by a SPI command. This is the Bus Stand-by mode
having the lowest power consumption for the transceiver.
CANL is biased to the battery voltage via the RTL output and
the pull-up current source on CANL and pull down current
source on CANH are disabled. Wake-up requests are
recognized by the transceiver when a dominant state is
detected on either bus wake-up lines. On a Bus wake-up
request, the SBC will activate the INT output or, if it is in the
Sleep mode, switch to the Normal Request mode. This event
is stored in the Wake-Up Input Status Register (WUISR).
(RF) fields, wake-up threshold levels have to be maintained
for a certain time. While in the Transceiver Low Power mode,
failure detection circuit remains partly active preventing
increased power consumption in cases of error 3, 4, 7, and 8.
Power-On
Normal Request mode. Bus Stand-by is the corresponding
mode for the CAN transceiver.
below its under voltage threshold, the transceiver is forced to
Bus Stand-by mode (fail safe property).
SBC MODES
Global Power Save Concept
Several operating modes are available to go to low power
22
33389
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
The CAN transceiver has its own functioning modes:
are enabled. Full failure detection is enabled.
Note: Standard/RXTX and Extended/RXTX are
receive portion of the transceiver remains active. In this
mode, RX reports bus and TX activity (RX = TX or Bus
dominant).
Note: Standard/RX Only and Extended/RX Only are
transceiver. The driver and receivers are disabled. Wake-
up capability on both bus lines as well as Failure 3, 4, 7,
and 8 detection are enabled. RTL termination is set to
V
The transceiver provides a Low Power mode, entered and
To prevent a false wake-up resulting from transients or
After the VBAT supply is switched ON, the SBC is in
The CAN transceiver is supplied by V2. As long as V2 is
The SBC minimizes power consumption of the ECU.
BAT
in the Bus Stand-by mode.
BAT
/Term V
CC
mode, and RX Only
OPERATIONAL MODES
consumption when the full activity is not required. Several
possibilities are provided to wake-up the ECU. This permits
peripherals or the microcontroller to be switched OFF when
no activity on the ECU is required.
are provided for optimum ECU power management.
Generalities
temporary mode, Normal Request, while waiting for
microcontroller configuration.
Reset Mode
software watchdog trigger occurs. The minimum duration for
reset mode is 1.0 ms typical, and unless there is a V1 failure
condition, the SBC enters the Normal Request mode after
reset.
short to ground), the SBC switches to the Reset mode. If V1
is still below the reset threshold after 100 ms, the behavior
depends upon the device version A or C:
• C version: The 33389CDW and the 33389CDH will remain
• D version: The 33389DDW and the 33389DEG will remain
Normal Request Mode
33389 reset. V1 is active, while V2 and V3 are passive. The
SBC is not configured. The default values are set in the
registers. The SBC awaits data configuration via the SPI.
released, the SBC switches itself into the Sleep mode.
SBC must receive to consider when the microcontroller
begins the configuration sequence. Once received, this
software timing word, and the watchdog timer, become
active. Any other control data can then be sent from the
microcontroller to SBC.
before the software timing word is programmed into the SBC.
In this mode, neither V2 nor the CAN transmitter are active.
1. Sleep
2. Stand-by
3. Normal
4. Emergency
Two switchable independent supply voltages (V1 and V2)
The SBC can be operated in four modes:
After reset, the 33389 is automatically initialized to the
This mode is entered after SBC power-up, or if an incorrect
In the case of a V1 failure condition leading to V1 low (ex:
in the reset mode.
in the reset mode. Note that the reset mode threshold for
the D version is slightly higher than the C version.
The Normal Request mode is the Default mode after
If no SPI data is received 75 ms after the Reset is
The software timing word (in SWCR) provides the data the
The watchdog is not active in the Normal Request mode
Analog Integrated Circuit Device Data
Freescale Semiconductor