33902 datasheet(14/31 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33902

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

Figure 9. VDD Low Illustration

Table 5. Functional Table

STBY

Mode

VDD

INH

RXD

CAN

ERR (active low)

Standby

ON (8)

High

Active LOW:

report wake-up event (9)

Terminated to GND

Active LOW:

report wake-up event (9)

Sleep

OFF

Go to sleep

High

Listen Only

High

High: recessive state

Low: dominant state

Receiver: ON

Driver: OFF

•Report local failure, VDD

low, Bat fail

Normal

High

Driver and

Receiver: ON

•wake-up source (10)

•BUS failures, VDD low

Notes

With limited current capability, in order to maintain the capacitor at VDD pin charged

Provided if VIO > 2.5 V.

10.

Before 4th TX pulse rising edge

VSUP

~3.0 V

5.0 V

VDD

VDD_low

CAN driver disabled

10 ms

ERR(1)

4.25 V

5.0 V

VDD

VDD_low

CAN driver disable

10 ms

ERR(1)

4.25 V

VDD disabled

50 ms

Normal or Listen Only

VDD overload condition

Start

End

CAN driver enabled

VDD re-enabled

MODE

VDD low illustration, VSUP > VSUP low (VSUP > 5.8 V)

VDD low illustration, cranking pulse VSUP < VSUP low (VSUP < 5.8 V) and CRANK bit low in P_SPI register.

EN, STBY, VIO high

4.25 V

1) See figure on ERR reporting

2) VDD is re enabled when VSUP recovers (VSUP low flag goes from H to L) or by a mode change via EN and STBY input.

VDD re-enabled (2)

VDD disabled (3)

50 ms

VSUP_low

5.8 V

VSUP_low

5.8 V

3) Capacitor charged maintained by internal device current source

(3)

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