MC33389CDW Freescale, MC33389CDW Datasheet - Page 29

• Manufacturer Part Number: MC33389CDW
• Manufacturer: Freescale

Specifications of MC33389CDW

• Number Of Transceivers: 1
• Power Down Mode: Sleep/Standby
• Operating Supply Voltage (max): 27V
• Operating Supply Voltage (typ): 9/12/15/18/24V
• Operating Supply Voltage (min): 5.5V
• Package Type: SOIC W
• Supply Current: 7mA
• Operating Temperature (max): 125C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Not Compliant

Sleep Mode Activation
regulator OFF . Thus the microcontroller can not run any
mode.
should enable and turn ON V1. This is achieved by an SBC
wake-up event.
application and have the microcontroller in Run mode.
Sleep mode:
• Wake-up from CAN interface and wake-up from SPI (CS)
• Wake-up from L0,L1, and L2 inputs, with and without cyclic
General Condition to Enter Sleep Mode
the SBC enters the Sleep mode, and Write operations into
the MCR and MCVR. To clear a wake-up condition requires
reading the appropriate register.
up or cold start), the following registers must be read:
• WUICR—possible wake-up event report from CAN bus
• RSR—report a V1 under voltage
• VSSR—reports a V
conditions, or flags are reset.
the SBC has experienced a loss of battery voltage.
registers indicate the wake-up source. They must be cleared
to allow the SBC to enter Sleep mode again:
• WUICR—wake-up event report for CAN or SPI buses
• WUISR— wake-up event report for the L0,L1, and L2
• RSR—report a V1 under voltage
• VSSR—reports a V
• etc.
accomplished for the several Sleep modes and Wake-up
control options.
CAN and SPI wake will always be activated.
Sleep Mode with CAN and SPI Wake-Up
wake-up, there is no dedicated wake-up condition to be
Analog Integrated Circuit Device Data
Freescale Semiconductor
Once in the Sleep mode, the SBC turns the V1 and V2
In order to have the microcontroller run again, the SBC
Several options are available to wake-up the SBC and the
Some wake-ups are selectable; some are always active in
are always active.
sense and the forced wake-up (FWU) are selectable. The
selection must be done while the SBC is in Normal or
Stand-by mode, and prior to enter Sleep mode.
All previous wake-up conditions must be cleared, assuring
Once the SBC has powered-up from zero (battery power-
Once these read operations are completed, the wake-up
The VBSR0 bit in the VSSR can be used to determine if
Once the SBC is awakened from Sleep mode the following
inputs
The ensuing paragraphs describe the write operation to be
In addition to FWU, cyclic sense and direct wake-up, the
To enter the Sleep mode and activate the only CAN or SPI
BAT
BAT
fail flag
fail flag
completed. The SBC has CAN and SPI wake-up sources
always active in the Sleep mode. To enter the Sleep mode in
this case, while the SBC is in Normal or Stand-by mode:
• Write to V3R—data 0000 (this clears the WI2V3 bit, is set
• Write to MCR—data SLEEP (100)
• Write to MCVR—data SLEEP (100)
Sleep Mode Enter with Forced Wake-Up
write to the following registers:
• Write to V3R (data 0100) this set the FWU bit to 1
• Write the desired wake-up time to CYTCR. (This sets the
• Write to MCR–data SLEEP (100)
• Write to MCVR– data SLEEP (100)
the time period is selected in the CYTCR.
Sleep Mode Enter with Cyclic Sense
wake-up the following registers must be written:
• Write to V3R (data 1010) this sets the VI2V3 and CYS bits
• Write to CYTCR the desired cyclic sense period. (This sets
• Write to WUICR bits 0 and 1 to select the edge sensitivity
• Write to MCR—data SLEEP (100)
• Write to MCVR—data SLEEP (100)
turn on V3 and while V3 is on, sample the level of the Ls
inputs.
consecutive samples, SBC will wake-up. If not, it will stay in
the Sleep mode. Refer to device description for detail.
Sleep Mode Enter With Direct LX Input Wake-Up
from the LX inputs, the following registers must be written:
• Write to V3R (data 0000) this clear VI2V3 bit
• Write to WUICR bits 0 and 1 to select the edge sensitivity
• Write to MCR—data SLEEP (100)
• Write to MCVR—data SLEEP (100)
soon as any of the LX input read the correct state.
to1after reset)
The SBC then enters the Sleep mode.
To enter the Sleep mode and activate the forced wake-up,
time the SBC will stay in the Sleep mode).
The SBC then enters the Sleep mode. It will wake-up after
To enter the Sleep mode and activate the cyclic sense
to 1
the time the SBC will wait in the Sleep mode to turn on V3
and sense the LX inputs)
for the LX inputs
The SBC then enters the Sleep mode. It will periodically
If any of the 3 LX inputs is in the correct state for two
To enter the Sleep mode and activate the direct wake-up
for the LX inputs
The SBC then enters the Sleep mode. It will wake-up as
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
33389
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