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| 33902 Datasheet, PDF (26/31 Pages) Freescale Semiconductor, Inc – High Speed CAN Interface with Embedded 5.0 V Supply | |||
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FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
VSUV
VIO low
VDD low
Description
Set
Reset
VSUP under-voltage detected
In Normal and Listen Only modes, if the VSUP under-voltage threshold condition detected
Entering low power mode, VSUP under-voltage threshold condition recovered + P_SPI reading (Listen
Only and Normal mode)
Action
When VSUP voltage rises above the VSUS threshold, the VDD regulator is re-enabled if disabled previously
by a VDD low condition
Description
VIO low detected
Set
In all modes, if VIO under-voltage threshold condition detected
Reset
Entering low power mode, VIO under-voltage threshold condition recovered + P_SPI reading (listen only
and normal mode)
Action
After 10ms, set the device in Sleep mode, if VSUV low (donât enter Sleep mode during crank and power
up phase).
Description
VDD voltage < VDDLOW flag threshold
Set
In all modes, if VDD under-voltage threshold condition detected
Reset
Entering low power mode, VDD under-voltage threshold condition recovered + P_SPI reading (Listen Only
and Normal mode), mode change between Normal and Listen Only if VDD regulator was turned off
previously by a VDD low condition for more than 50ms.
Action
After 10 ms, disable the CAN, after 50 ms disable the regulator, if CRANK bit is set low (default).
33902
26
Analog Integrated Circuit Device Data
Freescale Semiconductor
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