MC33989DW Freescale Semiconductor, MC33989DW Datasheet - Page 41

• Manufacturer Part Number: MC33989DW
• Description: IC SYSTEM BASE W/CAN 28-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33989DW

• 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)
• For Use With: KIT33989DWEVB - KIT EVAL 33989DW HS SBC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Failure on VDD1, Watchdog, Reset, INT Pins
and of the INT, RST, and WD pins at power up and under
failure of VDD1.
Power Up and SBC Entering Normal Operation
(CAN interface is in TX/RX mode): V
Power Up and V
Default Low Power Mode Selected
above. If V
(typ 4.6 V) for instance by an overcurrent or short circuit (ex
short to 4 V), and if a low power mode previously selected
Analog Integrated Circuit Device Data
Freescale Semiconductor
SPI (CS)
VDD1
WD
RST
INT
The paragraphs below describe the behavior of the device
After a power-up the SBC enters in Normal request mode
The first part of the following figure is identical to the
SPI (CS)
VDD1
WD
RST
INT
DD1
SBC in
RESET
mode
Figure 24. Power Up and V
SBC in
RESET
mode
is pulled below the V
DD1
Going Low with Stop Mode as
Reset every 350 ms
SBC in Normal request
mode
350 ms
Reset every 350 ms
350 ms
SBC in Normal request
mode
Figure 23. Power Up and SBC Entering Normal Operation
DD1
DD1
is on, V2 is off. After
under voltage reset
DD1
Going Low with Stop Mode as Default Low Power Mode Selected
Write Watchdog each X ms
SBC in Normal
mode
SBC in Normal
mode
Write Watchdog
each X ms
350 ms if no watchdog is written (no TIM1 register write) a
reset occurs, and the SBC returns to normal request
mode.During this sequence WD is active (low level).
V
the reset pin is high. If the watchdog is not refreshed, the SBC
generates a reset and returns to Normal request mode.
was stop mode, the SBC enters reset mode (reset pin is
active). The pin WD stays high, but the high level (V
follows the V
restarts in Normal request mode.
DD1
Once watchdog is written the SBC goes to normal mode:
When the V
is still on and V2 turns on, WD is no longer active and
DD1
SBC in Normal
request mode
DD1
SBC in Reset
mode
level. The interrupt pin goes low.
overload condition is removed, the SBC
Watchdog period
No problem on
SUPPLEMENTAL APPLICATION NOTES
No Watchdog is written
TYPICAL APPLICATIONS
SBC in Normal
mode
SBC in Normal
Request mode
350 ms
OH
)
33989
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