MC33912_10 Datasheet, PDF(32/94 Page) Freescale Semiconductor, Inc – LIN System Basis Chip with DC Motor Pre-driver and Current Sense

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MC33912_10 Datasheet, PDF (32/94 Pages) Freescale Semiconductor, Inc – LIN System Basis Chip with DC Motor Pre-driver and Current Sense

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FUNCTIONAL DEVICE OPERATIONS

OPERATIONAL MODES

MC33912G5AC / MC34912G5AC

Table 7. Fault Detection Management Conditions

BLOCK

Power Supply

LIN

FAULT

MODE

BATTERY FAIL

All modes

VSUP OVER-

VOLTAGE

VSUP UNDER-

VOLTAGE

Normal, Normal

Request

VDD UNDER-

VOLTAGE

All except Sleep

VDD OVER-TEMP

PREWARNING

VDD OVER-

TEMPERATURE

All except Low

Power modes

RXD PIN SHORT

CIRCUIT

TXD PIN

PERMANENT

DOMINANT

Normal, Normal

Request

LIN DRIVER OVER-

TEMPERATURE

HIGH SIDE DRIVERS

OVER-

TEMPERATURE

CONDITION

FALLOUT

RECOVERY

VSUP<3.0 V (typ)

then power-up

Condition gone

VSUP > 19.25 V (typ)

In Normal mode, HS

and LS shutdown if

bit HVSE=1 (reg

MCR)

Condition gone, to

re-enable HS or LS

write to HSCR or

LSCR registers

VSUP < 6.0 V (typ)

MONITORING(69)

REG (FLAG,

BIT)

INTERRUPT

VSR (BATFAIL, 0)

VSR (VSOV,3)

IRQ low +

ISR (0101)

(70)

VSR (VSUV,2)

IRQ low + ISR

(0101)

VDD < 4.5 V (typ)

Reset (68)

Temperature >

115Â°C (typ)

Temperature >

170Â°C (typ)

RXD pin shorted to

GND or 5 V

VDD shutdown,

Reset then Sleep

LIN trans shutdown

TXD pin low for more

than 1s (typ)

Temperature >

160Â°C (typ)

LIN transmitter

shutdown

Temperature >

160Â°C (typ)

Both HS thermal

shutdown

Condition gone

VSR (VDDOT,1)

LIN transmitter re-

enabled once the

condition is gone and

TXD is high

LINSR,

(RXSHORT,3)

LINSR (TXDOM,2)

LINSR (LINOT,1)

Condition gone, to

re-enable HS write to

HSCR reg

All flags in HSSR

are set

IRQ low + ISR

(0101)

IRQ low + ISR

(0100)(70)

IRQ low + ISR

(0010) (70)

High Side

Low Side

Watchdog

HS1 OPEN-LOAD

DETECTION

HS2 OPEN-LOAD

DETECTION

Normal, Normal

Request

HS1 OVER-

CURRENT

HS2 OVER-

CURRENT

LOW SIDE DRIVERS

OVER-

TEMPERATURE

LS1 OPEN-LOAD

LS2 OPEN-LOAD

Normal, Normal

Request

LS1 OVER-CURRENT

LS2 OVER-CURRENT

NORMAL REQUEST

TIME-OUT EXPIRED

Normal Request

WATCHDOG

TIMEOUT

Normal

WATCHDOG ERROR Normal

Current through HSx

< 5.0 mA (typ)

HSSR (HS1OP,1)

HSSR (HS2OP,3)

Condition gone

Current through HSx

tends to rise above

the current limit

60 mA (min)

HSx on with limited

current capability

60 mA (min)

HSSR (HS1CL,0)

HSSR (HS2CL,2)

Temperature >

160Â°C (typ)

Both LS thermal

shutdown

Current through LSx

< 7.5mA (typ)

Current through LSx

tends to rise above

the current limit

160 mA (min)

LSx on with limited

current capability

160 mA (min)

The MCU did not

command the device

to Normal mode

within the 150 ms

timeout after reset

Reset

WD timeout or WD

clear within the

window closed

Reset

WDCONF pin is

floating

WD internal lower

precision timebase

150 ms (typ)

Condition gone, to

re-enable LS write to

LSCR reg

All flags in LSSR are

set

IRQ low + ISR

(0011) (70)

LSSR (LS1OP,1)

LSSR (LS2OP,3)

LSSR (LS1CL,0)

LSSR (LS2CL,2)

WDSR (WDTO, 3)

Connect WDCONF

to a resistor or to

GND

WDSR (WDERR, 2)

Notes

68.

69.

70.

When in Reset mode a VDD under-voltage condition combined with no VSUP under-voltage (VSUV=0) will send the device to Sleep mode.

Registers to be read when back in Normal Request or Normal mode depending on the fault. Interrupts only generated in Normal, Normal Request and Stop modes

Unless masked, If masked IRQ remains high and the ISR flags are not set.

33912

Analog Integrated Circuit Device Data

Freescale Semiconductor

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