33902 datasheet(13/31 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33902

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

STATE DIAGRAMS

Figure 8. State Diagram

Notes

Coming from Standby mode

If VI/O is still switched on

Coming from Normal mode

If batfail flag and wake-up flag are cleared. An attempt to enter Sleep mode without batfail and wake-up flag cleared has no effect

Limited current capability, to maintain the capacitor at VDD charged.

A high level on INH will report a wake-up in Sleep mode

After 4 TXD pulses rising edge

Normal mode (STBY 1, EN 1)

VDD ON, INH ON

Listen Only (STBY 1, EN 0)

Standby (STBY 0, EN 0)

(From any state if

VI/O low, after

TVIO-SLP, if

VSUP > VSUV

Driver ON; Receiver ON, SPLIT 2.5 V

VDD ON, INH ON

Driver OFF; Receiver ON, SPLIT 2.5 V

Go to sleep (STBY 0, EN 1)

VDD ON, INH ON

Terminated to ground, SPLIT HZ

ERR report: Wake-up

Sleep (STBY 0, EN 0)

Terminated to ground, SPLIT HZ

ERR report: Wake-up (2)

Terminated to ground, SPLIT HZ

ERR report: Wake-up

Mode (STBY, EN)

Legend:

(CAN, SPLIT)

(ERR)

t>tH

(VDD ON, INH)

if VIO ON (2)

Power

Down

Power up

Local or CAN

wake-up

if VIO ON (2)

STBY 1

STBY 0

EN 1

EN 0

STBY 1

EN 1

STBY 0

EN 0

STBYB 0

EN 1

STBYB 1

EN 1

STBY 1

EN 0

STBY 0

EN 0

STBY 1

EN 0

and with

VIO > VIO low threshold

STBY 1

EN 1

and

VIO > VIO low threshold

Automatic transition

Controlled transition

VDD OFF, INH HZ (6)

VDD ON

(5), INH ON

ERR report: BATfail) (1)

(VDD low, local failure)

(3)

ERR report: wake-up source &

(VDD low and CAN bus failure) (7)

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